{"id":107668,"date":"2025-05-05T15:29:12","date_gmt":"2025-05-05T11:59:12","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/"},"modified":"2025-05-05T15:29:12","modified_gmt":"2025-05-05T11:59:12","slug":"the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/","title":{"rendered":"\u0627\u0633\u0631\u0627\u0631 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627: \u0631\u0647\u06af\u06cc\u0631\u06cc \u0648 \u06a9\u0646\u062a\u0631\u0644 \u0627\u0634\u06cc\u0627\u0621 \u062f\u0631 JavaScript"},"content":{"rendered":"<div data-article-id=\"2456450\" id=\"article-body\">\n<p><em>\u062f\u0631 \u067e\u0634\u062a \u0635\u062d\u0646\u0647 \u0627\u0634\u06cc\u0627\u0621 JavaScript \u0627\u0628\u0632\u0627\u0631\u06cc 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>\u0622\u0646\u0627\u062a\u0648\u0645\u06cc \u06cc\u06a9 \u067e\u0631\u0648\u06a9\u0633\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D8%AA%D9%84%D9%87_%D9%87%D8%A7%DB%8C_%D8%A7%D8%B3%D8%A7%D8%B3%DB%8C\" >\u062a\u0644\u0647 \u0647\u0627\u06cc \u0627\u0633\u0627\u0633\u06cc<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#1_%D8%AF%D8%B1%DB%8C%D8%A7%D9%81%D8%AA_%DA%A9%D9%86%DB%8C%D8%AF\" >1. \u062f\u0631\u06cc\u0627\u0641\u062a \u06a9\u0646\u06cc\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#2_%D9%85%D8%AC%D9%85%D9%88%D8%B9%D9%87\" >2. \u0645\u062c\u0645\u0648\u0639\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#3_%D8%AF%D8%B1%D8%AE%D9%88%D8%A7%D8%B3%D8%AA_%DA%A9%D9%86%DB%8C%D8%AF\" >3. \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u06a9\u0646\u06cc\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#4\" >4<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D9%85%D9%88%D8%A7%D8%B1%D8%AF_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D9%BE%DB%8C%D8%B4%D8%B1%D9%81%D8%AA%D9%87\" >\u0645\u0648\u0627\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u067e\u06cc\u0634\u0631\u0641\u062a\u0647<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#1_%D8%A7%D8%B9%D8%AA%D8%A8%D8%A7%D8%B1_%D8%B3%D9%86%D8%AC%DB%8C_%D8%AE%D9%88%D8%AF%DA%A9%D8%A7%D8%B1\" >1. \u0627\u0639\u062a\u0628\u0627\u0631 \u0633\u0646\u062c\u06cc \u062e\u0648\u062f\u06a9\u0627\u0631<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#2_%D8%A7%D8%B4%DB%8C%D8%A7%D8%A1_%D9%88%D8%A7%DA%A9%D9%86%D8%B4%DB%8C_%D8%B3%D8%A8%DA%A9_vuejs\" >2. \u0627\u0634\u06cc\u0627\u0621 \u0648\u0627\u06a9\u0646\u0634\u06cc (\u0633\u0628\u06a9 vue.js)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#3_%D9%85%D8%AD%D8%A7%D9%81%D8%B8%D8%AA_%D8%AF%D8%B1_%D8%A8%D8%B1%D8%A7%D8%A8%D8%B1_%D8%A7%D8%B5%D9%84%D8%A7%D8%AD%D8%A7%D8%AA_%D9%86%D8%A7%D8%AE%D9%88%D8%A7%D8%B3%D8%AA%D9%87\" >3. \u0645\u062d\u0627\u0641\u0638\u062a \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u0627\u0635\u0644\u0627\u062d\u0627\u062a \u0646\u0627\u062e\u0648\u0627\u0633\u062a\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#4_%D8%A8%D8%A7%D8%B1%DA%AF%D8%B0%D8%A7%D8%B1%DB%8C_%D8%AA%D9%86%D8%A8%D9%84_%D9%88_%D8%AD%D8%A7%D9%81%D8%B8%D9%87_%D9%BE%D9%86%D9%87%D8%A7%D9%86_%D8%A7%D9%85%D9%84%D8%A7%DA%A9\" >4. \u0628\u0627\u0631\u06af\u0630\u0627\u0631\u06cc \u062a\u0646\u0628\u0644 \u0648 \u062d\u0627\u0641\u0638\u0647 \u067e\u0646\u0647\u0627\u0646 \u0627\u0645\u0644\u0627\u06a9<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D8%AE%D8%B7%D8%B1%D8%A7%D8%AA_%D9%88_%D9%85%D9%84%D8%A7%D8%AD%D8%B8%D8%A7%D8%AA_%D8%B9%D9%85%D9%84%DA%A9%D8%B1%D8%AF\" >\u062e\u0637\u0631\u0627\u062a \u0648 \u0645\u0644\u0627\u062d\u0638\u0627\u062a \u0639\u0645\u0644\u06a9\u0631\u062f<\/a><ul class='ez-toc-list-level-3' ><li 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href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#3_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D9%87%D8%A7_%D8%A8%D9%87_%D8%B9%D9%86%D9%88%D8%A7%D9%86_%D9%85%D8%AB%D8%A7%D9%84_%D8%B4%D9%81%D8%A7%D9%81_%D9%86%DB%8C%D8%B3%D8%AA%D9%86%D8%AF\" >3. \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644 \u0634\u0641\u0627\u0641 \u0646\u06cc\u0633\u062a\u0646\u062f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D8%A7%D8%AF%D8%BA%D8%A7%D9%85_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D8%A8%D8%A7_%D8%B3%D8%A7%DB%8C%D8%B1_%D9%88%DB%8C%DA%98%DA%AF%DB%8C_%D9%87%D8%A7%DB%8C_%D9%85%D8%AF%D8%B1%D9%86\" >\u0627\u062f\u063a\u0627\u0645 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0628\u0627 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\u0646\u0642\u0634\u0647 \u0636\u0639\u06cc\u0641 \u0628\u0631\u0627\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u062e\u0635\u0648\u0635\u06cc<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D8%A7%D9%84%DA%AF%D9%88%D9%87%D8%A7%DB%8C_%D9%BE%DB%8C%D8%B4%D8%B1%D9%81%D8%AA%D9%87_%D8%A8%D8%A7_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D9%87%D8%A7\" >\u0627\u0644\u06af\u0648\u0647\u0627\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0628\u0627 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D9%85%D8%AC%D8%A7%D9%88%D8%B1%D8%AA_%D8%B9%D9%85%DB%8C%D9%82\" >\u0645\u062c\u0627\u0648\u0631\u062a \u0639\u0645\u06cc\u0642<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D8%A7%D9%84%DA%AF%D9%88%DB%8C_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D9%87%D8%A7%DB%8C_%D9%82%D8%A7%D8%A8%D9%84_%D8%A8%D8%B1%DA%AF%D8%B4%D8%AA_%D8%A8%D8%B1%D8%A7%DB%8C_%DA%A9%D9%86%D8%AA%D8%B1%D9%84_%D8%AF%D8%B3%D8%AA%D8%B1%D8%B3%DB%8C_%D9%85%D9%88%D9%82%D8%AA\" >\u0627\u0644\u06af\u0648\u06cc: \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627\u06cc \u0642\u0627\u0628\u0644 \u0628\u0631\u06af\u0634\u062a \u0628\u0631\u0627\u06cc \u06a9\u0646\u062a\u0631\u0644 \u062f\u0633\u062a\u0631\u0633\u06cc \u0645\u0648\u0642\u062a<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/nabfollower.com\/blog\/the-secrets-of-proxies-intercepting-and-controlling-objects-in-javascript-14il\/#%D9%86%D8%AA%DB%8C%D8%AC%D9%87_%DA%AF%DB%8C%D8%B1%DB%8C\" >\u0646\u062a\u06cc\u062c\u0647 \u06af\u06cc\u0631\u06cc:<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D9%85%D9%82%D8%AF%D9%85%D9%87_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D9%87%D8%A7_%DA%86%DB%8C%D8%B3%D8%AA%D8%9F\"><\/span>\n<p>  \u0645\u0642\u062f\u0645\u0647: \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0686\u06cc\u0633\u062a\u061f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062f\u0631 JavaScript \u060c \u067e\u0631\u0627\u06a9\u0633\u06cc \u0647\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0648\u0627\u0633\u0637\u0647 \u0628\u0631\u0627\u06cc \u0627\u0634\u06cc\u0627\u0621 \u0639\u0645\u0644 \u0645\u06cc \u06a9\u0646\u0646\u062f \u0648 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f \u0631\u0641\u062a\u0627\u0631\u0647\u0627\u06cc \u0627\u0633\u0627\u0633\u06cc \u0645\u0627\u0646\u0646\u062f \u062e\u0648\u0627\u0646\u062f\u0646 \u0645\u0644\u06a9 \u060c \u062a\u06a9\u0644\u06cc\u0641 \u0627\u0631\u0632\u0634 \u060c \u0634\u0645\u0627\u0631\u0634 \u060c \u062f\u0639\u0648\u062a \u0639\u0645\u0644\u06a9\u0631\u062f \u0648 \u062d\u062a\u06cc \u0639\u0645\u0644\u06cc\u0627\u062a \u0631\u0627 \u0628\u0627 \u0622\u0646 \u0633\u0641\u0627\u0631\u0634\u06cc \u06a9\u0646\u06cc\u062f <code>new<\/code> \u0627\u067e\u0631\u0627\u062a\u0648\u0631 \u0645\u0639\u0631\u0641\u06cc \u0634\u062f\u0647 \u062f\u0631 ES6 (ECMAScript 2015) \u060c \u0628\u0627 \u0648\u062c\u0648\u062f \u0627\u0631\u0627\u0626\u0647 \u0627\u0645\u06a9\u0627\u0646\u0627\u062a \u0686\u0634\u0645\u06af\u06cc\u0631 \u060c \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u062a\u0648\u0633\u0637 \u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u062a\u0648\u0633\u0639\u0647 \u062f\u0647\u0646\u062f\u06af\u0627\u0646 \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0642\u0631\u0627\u0631 \u0646\u0645\u06cc \u06af\u06cc\u0631\u0646\u062f.<\/p>\n<p>\u06cc\u06a9 \u067e\u0631\u0648\u06a9\u0633\u06cc \u06cc\u06a9 \u0647\u062f\u0641 \u0647\u062f\u0641 \u0631\u0627 \u0645\u06cc \u067e\u06cc\u0686\u062f \u0648 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u06a9\u0646\u062f <em>\u062a\u0644\u0647<\/em> \u06a9\u0647 \u062f\u0631 \u0635\u0648\u0631\u062a \u0627\u0646\u062c\u0627\u0645 \u0639\u0645\u0644\u06cc\u0627\u062a \u062e\u0627\u0635 \u0628\u0631 \u0631\u0648\u06cc \u0634\u06cc \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc \u0634\u0648\u0646\u062f. \u0627\u06cc\u0646 \u062a\u0644\u0647 \u0647\u0627 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u0631\u0641\u062a\u0627\u0631 \u067e\u06cc\u0634 \u0641\u0631\u0636 JavaScript \u0631\u0627 \u0631\u0647\u06af\u06cc\u0631\u06cc \u0648 \u0633\u0641\u0627\u0631\u0634\u06cc \u06a9\u0646\u06cc\u062f.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D8%A2%D9%86%D8%A7%D8%AA%D9%88%D9%85%DB%8C_%DB%8C%DA%A9_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C\"><\/span>\n<p>  \u0622\u0646\u0627\u062a\u0648\u0645\u06cc \u06cc\u06a9 \u067e\u0631\u0648\u06a9\u0633\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0633\u0627\u062e\u062a\u0627\u0631 \u0627\u0633\u0627\u0633\u06cc \u06cc\u06a9 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0627\u0632 \u062f\u0648 \u0645\u0624\u0644\u0641\u0647 \u0627\u0635\u0644\u06cc \u062a\u0634\u06a9\u06cc\u0644 \u0634\u062f\u0647 \u0627\u0633\u062a:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">proxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">);<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<ul>\n<li>\n<strong>\u0647\u062f\u0641<\/strong>: \u0634\u06cc\u0621 \u0627\u0635\u0644\u06cc \u06a9\u0647 \u062a\u0648\u0633\u0637 \u067e\u0631\u0648\u06a9\u0633\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f<\/li>\n<li>\n<strong>\u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u0646\u062f\u0647<\/strong>: \u06cc\u06a9 \u0634\u06cc\u0621 \u062d\u0627\u0648\u06cc &#8220;\u062a\u0644\u0647&#8221; \u06a9\u0647 \u0631\u0641\u062a\u0627\u0631 \u0633\u0641\u0627\u0631\u0634\u06cc \u0631\u0627 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u06a9\u0646\u062f<\/li>\n<\/ul>\n<hr\/>\n<h2><span class=\"ez-toc-section\" id=\"%D8%AA%D9%84%D9%87_%D9%87%D8%A7%DB%8C_%D8%A7%D8%B3%D8%A7%D8%B3%DB%8C\"><\/span>\n<p>  \u062a\u0644\u0647 \u0647\u0627\u06cc \u0627\u0633\u0627\u0633\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>JavaScript 13 \u062a\u0644\u0647 \u0645\u062e\u062a\u0644\u0641 \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f \u060c \u0627\u0645\u0627 \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0631\u0648\u06cc \u0642\u062f\u0631\u062a\u0645\u0646\u062f\u062a\u0631\u06cc\u0646 \u0622\u0646\u0647\u0627 \u062a\u0645\u0631\u06a9\u0632 \u06a9\u0646\u06cc\u0645:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_%D8%AF%D8%B1%DB%8C%D8%A7%D9%81%D8%AA_%DA%A9%D9%86%DB%8C%D8%AF\"><\/span>\n<p>  1. \u062f\u0631\u06cc\u0627\u0641\u062a \u06a9\u0646\u06cc\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u062f\u0631 <code>get<\/code> Trap Rejection Properts \u062e\u0648\u0627\u0646\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a. \u0647\u0631 \u0632\u0645\u0627\u0646 \u06a9\u0647 \u0628\u0647 \u06cc\u06a9 \u0648\u06cc\u0698\u06af\u06cc \u0634\u06cc \u062f\u0633\u062a\u0631\u0633\u06cc \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u062f \u060c \u0634\u0631\u0648\u0639 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">handler<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Accessing property: <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">user<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">Anna<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"na\">age<\/span><span class=\"p\">:<\/span> <span class=\"mi\">28<\/span> <span class=\"p\">};<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">userProxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">user<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">);<\/span>\n\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">userProxy<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"p\">);<\/span> \n<span class=\"c1\">\/\/ Output:<\/span>\n<span class=\"c1\">\/\/ Accessing property: name<\/span>\n<span class=\"c1\">\/\/ Anna<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"2_%D9%85%D8%AC%D9%85%D9%88%D8%B9%D9%87\"><\/span>\n<p>  2. \u0645\u062c\u0645\u0648\u0639\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u062f\u0631 <code>set<\/code> \u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0628\u0647 \u062e\u0648\u0627\u0635 \u0627\u062e\u062a\u0635\u0627\u0635 \u0645\u06cc \u06cc\u0627\u0628\u062f \u060c \u062a\u0644\u0647 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">handler<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">age<\/span><span class=\"dl\">'<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"k\">typeof<\/span> <span class=\"nx\">value<\/span> <span class=\"o\">!==<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">number<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">TypeError<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Age must be a number<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n    <span class=\"p\">}<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Setting <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\"> = <\/span><span class=\"p\">${<\/span><span class=\"nx\">value<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">userProxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">({},<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">);<\/span>\n\n<span class=\"nx\">userProxy<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">Charles<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ Setting name = Charles<\/span>\n<span class=\"nx\">userProxy<\/span><span class=\"p\">.<\/span><span class=\"nx\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">30<\/span><span class=\"p\">;<\/span>         <span class=\"c1\">\/\/ Setting age = 30<\/span>\n<span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nx\">userProxy<\/span><span class=\"p\">.<\/span><span class=\"nx\">age<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">thirty<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ Error!<\/span>\n<span class=\"p\">}<\/span> <span class=\"k\">catch <\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">.<\/span><span class=\"nx\">message<\/span><span class=\"p\">);<\/span>   <span class=\"c1\">\/\/ Age must be a number<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"3_%D8%AF%D8%B1%D8%AE%D9%88%D8%A7%D8%B3%D8%AA_%DA%A9%D9%86%DB%8C%D8%AF\"><\/span>\n<p>  3. \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u06a9\u0646\u06cc\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u062a\u0645\u0627\u0633 \u0647\u0627\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f\u06cc \u0631\u0627 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0646\u062d\u0648\u0647 \u0627\u062c\u0631\u0627\u06cc \u06cc\u06a9 \u0639\u0645\u0644\u06a9\u0631\u062f \u0631\u0627 \u062a\u063a\u06cc\u06cc\u0631 \u062f\u0647\u06cc\u062f.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">add<\/span><span class=\"p\">(<\/span><span class=\"nx\">a<\/span><span class=\"p\">,<\/span> <span class=\"nx\">b<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"nx\">a<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">b<\/span><span class=\"p\">;<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">handler<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">apply<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">thisArg<\/span><span class=\"p\">,<\/span> <span class=\"nx\">args<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Calling function with arguments: <\/span><span class=\"p\">${<\/span><span class=\"nx\">args<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">apply<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">thisArg<\/span><span class=\"p\">,<\/span> <span class=\"nx\">args<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">addProxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">add<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">);<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nf\">addProxy<\/span><span class=\"p\">(<\/span><span class=\"mi\">5<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">));<\/span>\n<span class=\"c1\">\/\/ Output:<\/span>\n<span class=\"c1\">\/\/ Calling function with arguments: 5,3<\/span>\n<span class=\"c1\">\/\/ 8<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"4\"><\/span>\n<p>  4<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0631\u0647\u06af\u06cc\u0631\u06cc <code>new<\/code> \u0627\u067e\u0631\u0627\u062a\u0648\u0631 \u060c \u0628\u0647 \u0634\u0645\u0627 \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0646\u062d\u0648\u0647 \u0641\u0648\u0631\u06cc \u0627\u0634\u06cc\u0627\u0621 \u0631\u0627 \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u06cc\u062f.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Person<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">constructor<\/span><span class=\"p\">(<\/span><span class=\"nx\">name<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">name<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">handler<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">construct<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">args<\/span><span class=\"p\">,<\/span> <span class=\"nx\">newTarget<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Creating new instance with: <\/span><span class=\"p\">${<\/span><span class=\"nx\">args<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">construct<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">args<\/span><span class=\"p\">,<\/span> <span class=\"nx\">newTarget<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">PersonProxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">Person<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">);<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">person<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">PersonProxy<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Daniel<\/span><span class=\"dl\">\"<\/span><span class=\"p\">);<\/span>\n<span class=\"c1\">\/\/ Output: Creating new instance with: Daniel<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<hr\/>\n<h2><span class=\"ez-toc-section\" id=\"%D9%85%D9%88%D8%A7%D8%B1%D8%AF_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D9%BE%DB%8C%D8%B4%D8%B1%D9%81%D8%AA%D9%87\"><\/span>\n<p>  \u0645\u0648\u0627\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u067e\u06cc\u0634\u0631\u0641\u062a\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_%D8%A7%D8%B9%D8%AA%D8%A8%D8%A7%D8%B1_%D8%B3%D9%86%D8%AC%DB%8C_%D8%AE%D9%88%D8%AF%DA%A9%D8%A7%D8%B1\"><\/span>\n<p>  1. \u0627\u0639\u062a\u0628\u0627\u0631 \u0633\u0646\u062c\u06cc \u062e\u0648\u062f\u06a9\u0627\u0631<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u06cc\u06a9\u06cc \u0627\u0632 \u0642\u062f\u0631\u062a\u0645\u0646\u062f\u062a\u0631\u06cc\u0646 \u06a9\u0627\u0631\u0628\u0631\u062f\u0647\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc \u060c \u0627\u0639\u062a\u0628\u0627\u0631 \u0633\u0646\u062c\u06cc \u0627\u062a\u0648\u0645\u0627\u062a\u06cc\u06a9 \u0628\u062f\u0648\u0646 \u0622\u0644\u0627\u06cc\u0646\u062f\u0647 \u06a9\u062f \u0634\u06cc \u0627\u0635\u0644\u06cc \u0627\u0633\u062a.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">createValidator<\/span><span class=\"p\">(<\/span><span class=\"nx\">schema<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">])<\/span> <span class=\"p\">{<\/span>\n        <span class=\"nx\">target<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">value<\/span><span class=\"p\">;<\/span>\n        <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"p\">;<\/span>\n      <span class=\"p\">}<\/span>\n\n      <span class=\"c1\">\/\/ Type validation<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">type<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"k\">typeof<\/span> <span class=\"nx\">value<\/span> <span class=\"o\">!==<\/span> <span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">type<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">TypeError<\/span><span class=\"p\">(<\/span><span class=\"s2\">`<\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\"> must be of type <\/span><span class=\"p\">${<\/span><span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">type<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n      <span class=\"p\">}<\/span>\n\n      <span class=\"c1\">\/\/ Format validation (regex)<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">pattern<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">!<\/span><span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">pattern<\/span><span class=\"p\">.<\/span><span class=\"nf\">test<\/span><span class=\"p\">(<\/span><span class=\"nx\">value<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Error<\/span><span class=\"p\">(<\/span><span class=\"s2\">`<\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\"> does not match the expected pattern`<\/span><span class=\"p\">);<\/span>\n      <span class=\"p\">}<\/span>\n\n      <span class=\"c1\">\/\/ Minimum value validation<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">min<\/span> <span class=\"o\">!==<\/span> <span class=\"kc\">undefined<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nx\">value<\/span> <span class=\"o\">&lt;<\/span> <span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">min<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">RangeError<\/span><span class=\"p\">(<\/span><span class=\"s2\">`<\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\"> must be &gt;= <\/span><span class=\"p\">${<\/span><span class=\"nx\">schema<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">].<\/span><span class=\"nx\">min<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n      <span class=\"p\">}<\/span>\n\n      <span class=\"nx\">target<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">value<\/span><span class=\"p\">;<\/span>\n      <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n  <span class=\"p\">};<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">userSchema<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">type<\/span><span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">string<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">},<\/span>\n  <span class=\"na\">email<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> \n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">string<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> \n    <span class=\"na\">pattern<\/span><span class=\"p\">:<\/span> <span class=\"sr\">\/^<\/span><span class=\"se\">[^\\s<\/span><span class=\"sr\">@<\/span><span class=\"se\">]<\/span><span class=\"sr\">+@<\/span><span class=\"se\">[^\\s<\/span><span class=\"sr\">@<\/span><span class=\"se\">]<\/span><span class=\"sr\">+<\/span><span class=\"se\">\\.[^\\s<\/span><span class=\"sr\">@<\/span><span class=\"se\">]<\/span><span class=\"sr\">+$\/<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"na\">age<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> \n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">number<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> \n    <span class=\"na\">min<\/span><span class=\"p\">:<\/span> <span class=\"mi\">18<\/span> \n  <span class=\"p\">}<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">user<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">({},<\/span> <span class=\"nf\">createValidator<\/span><span class=\"p\">(<\/span><span class=\"nx\">userSchema<\/span><span class=\"p\">));<\/span>\n\n<span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">Laura<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>   <span class=\"c1\">\/\/ OK<\/span>\n<span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nx\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">25<\/span><span class=\"p\">;<\/span>         <span class=\"c1\">\/\/ OK<\/span>\n<span class=\"c1\">\/\/ user.email = \"invalid\";  \/\/ Error: email does not match the expected pattern<\/span>\n<span class=\"c1\">\/\/ user.age = 15;           \/\/ Error: age must be &gt;= 18<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"2_%D8%A7%D8%B4%DB%8C%D8%A7%D8%A1_%D9%88%D8%A7%DA%A9%D9%86%D8%B4%DB%8C_%D8%B3%D8%A8%DA%A9_vuejs\"><\/span>\n<p>  2. \u0627\u0634\u06cc\u0627\u0621 \u0648\u0627\u06a9\u0646\u0634\u06cc (\u0633\u0628\u06a9 vue.js)<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>vue.js \u0627\u0632 \u062a\u06a9\u0646\u06cc\u06a9\u06cc \u0645\u0634\u0627\u0628\u0647 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0628\u0631\u0627\u06cc \u0627\u06cc\u062c\u0627\u062f \u0633\u06cc\u0633\u062a\u0645 \u0648\u0627\u06a9\u0646\u0634 \u067e\u0630\u06cc\u0631\u06cc \u062e\u0648\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f. \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u0627\u062c\u0631\u0627\u06cc \u0633\u0627\u062f\u0647 \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">reactive<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">observers<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Map<\/span><span class=\"p\">();<\/span>\n\n  <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"kd\">const<\/span> <span class=\"nx\">value<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">);<\/span>\n\n      <span class=\"c1\">\/\/ Collect the current dependency if it exists<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">activeEffect<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"k\">typeof<\/span> <span class=\"nx\">value<\/span> <span class=\"o\">!==<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">object<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"nx\">observers<\/span><span class=\"p\">.<\/span><span class=\"nf\">has<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\n          <span class=\"nx\">observers<\/span><span class=\"p\">.<\/span><span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Set<\/span><span class=\"p\">());<\/span>\n        <span class=\"p\">}<\/span>\n        <span class=\"nx\">observers<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span><span class=\"p\">).<\/span><span class=\"nf\">add<\/span><span class=\"p\">(<\/span><span class=\"nx\">activeEffect<\/span><span class=\"p\">);<\/span>\n      <span class=\"p\">}<\/span>\n\n      <span class=\"k\">return<\/span> <span class=\"nx\">value<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">},<\/span>\n\n    <span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"kd\">const<\/span> <span class=\"nx\">result<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">);<\/span>\n\n      <span class=\"c1\">\/\/ Notify observers<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">observers<\/span><span class=\"p\">.<\/span><span class=\"nf\">has<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\n        <span class=\"nx\">observers<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span><span class=\"p\">).<\/span><span class=\"nf\">forEach<\/span><span class=\"p\">(<\/span><span class=\"nx\">effect<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">effect<\/span><span class=\"p\">());<\/span>\n      <span class=\"p\">}<\/span>\n\n      <span class=\"k\">return<\/span> <span class=\"nx\">result<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n  <span class=\"p\">});<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"c1\">\/\/ Simplified tracking system<\/span>\n<span class=\"kd\">let<\/span> <span class=\"nx\">activeEffect<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">null<\/span><span class=\"p\">;<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">watchEffect<\/span><span class=\"p\">(<\/span><span class=\"nx\">fn<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nx\">activeEffect<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">fn<\/span><span class=\"p\">;<\/span>\n  <span class=\"nf\">fn<\/span><span class=\"p\">();<\/span>  <span class=\"c1\">\/\/ Execute the function to track dependencies<\/span>\n  <span class=\"nx\">activeEffect<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">null<\/span><span class=\"p\">;<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"c1\">\/\/ Usage<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">state<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">reactive<\/span><span class=\"p\">({<\/span> <span class=\"na\">counter<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">});<\/span>\n\n<span class=\"nf\">watchEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`The counter is: <\/span><span class=\"p\">${<\/span><span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">counter<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">});<\/span>\n\n<span class=\"c1\">\/\/ Initial output: The counter is: 0<\/span>\n<span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">counter<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span>    <span class=\"c1\">\/\/ Output: The counter is: 1<\/span>\n<span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">counter<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ Output: The counter is: 3<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"3_%D9%85%D8%AD%D8%A7%D9%81%D8%B8%D8%AA_%D8%AF%D8%B1_%D8%A8%D8%B1%D8%A7%D8%A8%D8%B1_%D8%A7%D8%B5%D9%84%D8%A7%D8%AD%D8%A7%D8%AA_%D9%86%D8%A7%D8%AE%D9%88%D8%A7%D8%B3%D8%AA%D9%87\"><\/span>\n<p>  3. \u0645\u062d\u0627\u0641\u0638\u062a \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u0627\u0635\u0644\u0627\u062d\u0627\u062a \u0646\u0627\u062e\u0648\u0627\u0633\u062a\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0627\u0632 \u0627\u0634\u06cc\u0627\u0621 \u0645\u0647\u0645 \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u0627\u0635\u0644\u0627\u062d\u0627\u062a \u0646\u0627\u062e\u0648\u0627\u0633\u062a\u0647 \u0645\u062d\u0627\u0641\u0638\u062a \u06a9\u0646\u0646\u062f \u060c \u0648 \u0647\u0645\u0686\u0646\u06cc\u0646 \u062f\u0633\u062a\u0631\u0633\u06cc \u063a\u06cc\u0631\u0645\u062c\u0627\u0632 \u0631\u0627 \u062a\u0634\u062e\u06cc\u0635 \u062f\u0647\u0646\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">protectObject<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"nx\">allowedOperations<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{})<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">allowedOperations<\/span><span class=\"p\">.<\/span><span class=\"nx\">read<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">!<\/span><span class=\"nx\">allowedOperations<\/span><span class=\"p\">.<\/span><span class=\"nx\">read<\/span><span class=\"p\">.<\/span><span class=\"nf\">includes<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\n        <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">warn<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Unauthorized read of property: <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n        <span class=\"k\">return<\/span> <span class=\"kc\">undefined<\/span><span class=\"p\">;<\/span>\n      <span class=\"p\">}<\/span>\n      <span class=\"k\">return<\/span> <span class=\"nx\">target<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">];<\/span>\n    <span class=\"p\">},<\/span>\n\n    <span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">allowedOperations<\/span><span class=\"p\">.<\/span><span class=\"nx\">write<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">!<\/span><span class=\"nx\">allowedOperations<\/span><span class=\"p\">.<\/span><span class=\"nx\">write<\/span><span class=\"p\">.<\/span><span class=\"nf\">includes<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\n        <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Unauthorized attempt to modify: <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n        <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"p\">;<\/span>\n      <span class=\"p\">}<\/span>\n      <span class=\"nx\">target<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">value<\/span><span class=\"p\">;<\/span>\n      <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">},<\/span>\n\n    <span class=\"nf\">deleteProperty<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Attempt to delete property: <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n  <span class=\"p\">});<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">secureConfig<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">protectObject<\/span><span class=\"p\">(<\/span>\n  <span class=\"p\">{<\/span> \n    <span class=\"na\">debug<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span><span class=\"p\">,<\/span> \n    <span class=\"na\">apiKey<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">sk_12345<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">timeout<\/span><span class=\"p\">:<\/span> <span class=\"mi\">30000<\/span> \n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">read<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">debug<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">timeout<\/span><span class=\"dl\">'<\/span><span class=\"p\">],<\/span>\n    <span class=\"na\">write<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">timeout<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">);<\/span>\n\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">secureConfig<\/span><span class=\"p\">.<\/span><span class=\"nx\">debug<\/span><span class=\"p\">);<\/span>   <span class=\"c1\">\/\/ true<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">secureConfig<\/span><span class=\"p\">.<\/span><span class=\"nx\">apiKey<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ Warning and undefined<\/span>\n<span class=\"nx\">secureConfig<\/span><span class=\"p\">.<\/span><span class=\"nx\">timeout<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">60000<\/span><span class=\"p\">;<\/span>      <span class=\"c1\">\/\/ Allowed<\/span>\n<span class=\"nx\">secureConfig<\/span><span class=\"p\">.<\/span><span class=\"nx\">apiKey<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">new_key<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>   <span class=\"c1\">\/\/ Error: Unauthorized attempt<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"4_%D8%A8%D8%A7%D8%B1%DA%AF%D8%B0%D8%A7%D8%B1%DB%8C_%D8%AA%D9%86%D8%A8%D9%84_%D9%88_%D8%AD%D8%A7%D9%81%D8%B8%D9%87_%D9%BE%D9%86%D9%87%D8%A7%D9%86_%D8%A7%D9%85%D9%84%D8%A7%DA%A9\"><\/span>\n<p>  4. \u0628\u0627\u0631\u06af\u0630\u0627\u0631\u06cc \u062a\u0646\u0628\u0644 \u0648 \u062d\u0627\u0641\u0638\u0647 \u067e\u0646\u0647\u0627\u0646 \u0627\u0645\u0644\u0627\u06a9<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u0632 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0628\u0631\u0627\u06cc \u0627\u062c\u0631\u0627\u06cc \u0628\u0627\u0631\u06af\u06cc\u0631\u06cc \u062a\u0646\u0628\u0644 \u0648 \u0630\u062e\u06cc\u0631\u0647 \u0633\u0627\u0632\u06cc \u062e\u0648\u0627\u0635 \u0645\u062d\u0627\u0633\u0628\u0627\u062a\u06cc \u06af\u0631\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">lazyProperties<\/span><span class=\"p\">(<\/span><span class=\"nx\">initializer<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">values<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{};<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">computed<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{};<\/span>\n\n  <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">({},<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span> <span class=\"k\">in<\/span> <span class=\"nx\">values<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\n        <span class=\"c1\">\/\/ If the property hasn't been calculated yet<\/span>\n        <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span> <span class=\"k\">in<\/span> <span class=\"nx\">initializer<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n          <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Calculating value for <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\">...`<\/span><span class=\"p\">);<\/span>\n\n          <span class=\"c1\">\/\/ Memoization: save the result for future use<\/span>\n          <span class=\"nx\">values<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">initializer<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">]();<\/span>\n          <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Value calculated and cached.`<\/span><span class=\"p\">);<\/span>\n        <span class=\"p\">}<\/span>\n      <span class=\"p\">}<\/span>\n      <span class=\"k\">return<\/span> <span class=\"nx\">values<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">];<\/span>\n    <span class=\"p\">}<\/span>\n  <span class=\"p\">});<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"c1\">\/\/ Usage:<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">data<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">lazyProperties<\/span><span class=\"p\">({<\/span>\n  <span class=\"na\">expensiveValue<\/span><span class=\"p\">:<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n    <span class=\"c1\">\/\/ Simulating an expensive operation<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Executing time-consuming calculation...<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n    <span class=\"kd\">let<\/span> <span class=\"nx\">result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\n    <span class=\"k\">for <\/span><span class=\"p\">(<\/span><span class=\"kd\">let<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">1000000<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span><span class=\"o\">++<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"nx\">result<\/span> <span class=\"o\">+=<\/span> <span class=\"nb\">Math<\/span><span class=\"p\">.<\/span><span class=\"nf\">random<\/span><span class=\"p\">();<\/span>\n    <span class=\"p\">}<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nx\">result<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">1000000<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"na\">anotherExpensiveValue<\/span><span class=\"p\">:<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n    <span class=\"c1\">\/\/ Another expensive operation<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nf\">fetch<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">https:\/\/api.example.com\/data<\/span><span class=\"dl\">'<\/span><span class=\"p\">).<\/span><span class=\"nf\">then<\/span><span class=\"p\">(<\/span><span class=\"nx\">r<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">r<\/span><span class=\"p\">.<\/span><span class=\"nf\">json<\/span><span class=\"p\">());<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">});<\/span>\n\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">expensiveValue<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ Calculates the first time<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">expensiveValue<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ Uses cached value<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<hr\/>\n<h2><span class=\"ez-toc-section\" id=\"%D8%AE%D8%B7%D8%B1%D8%A7%D8%AA_%D9%88_%D9%85%D9%84%D8%A7%D8%AD%D8%B8%D8%A7%D8%AA_%D8%B9%D9%85%D9%84%DA%A9%D8%B1%D8%AF\"><\/span>\n<p>  \u062e\u0637\u0631\u0627\u062a \u0648 \u0645\u0644\u0627\u062d\u0638\u0627\u062a \u0639\u0645\u0644\u06a9\u0631\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u06af\u0631\u0686\u0647 \u0642\u062f\u0631\u062a\u0645\u0646\u062f \u0627\u0633\u062a \u060c \u0627\u0645\u0627 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0647\u0627\u06cc \u0645\u0647\u0645\u06cc \u062f\u0627\u0631\u0646\u062f:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_%D8%AA%D8%A3%D8%AB%DB%8C%D8%B1_%D8%B9%D9%85%D9%84%DA%A9%D8%B1%D8%AF\"><\/span>\n<p>  1. \u062a\u0623\u062b\u06cc\u0631 \u0639\u0645\u0644\u06a9\u0631\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0644\u0627\u06cc\u0647 \u0627\u06cc \u0627\u0632 \u063a\u06cc\u0631\u0645\u0633\u062a\u0642\u06cc\u0645 \u0631\u0627 \u0627\u0636\u0627\u0641\u0647 \u0645\u06cc \u06a9\u0646\u0646\u062f \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0631 \u0639\u0645\u0644\u06a9\u0631\u062f \u062a\u0623\u062b\u06cc\u0631 \u0628\u06af\u0630\u0627\u0631\u062f \u060c \u0628\u0647 \u062e\u0635\u0648\u0635 \u062f\u0631 \u0639\u0645\u0644\u06cc\u0627\u062a \u0628\u0627 \u0641\u0631\u06a9\u0627\u0646\u0633 \u0628\u0627\u0644\u0627:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"c1\">\/\/ Performance test<\/span>\n<span class=\"kd\">function<\/span> <span class=\"nf\">testPerformance<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">obj<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">value<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">};<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">proxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span>\n    <span class=\"na\">get<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">),<\/span>\n    <span class=\"na\">set<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">});<\/span>\n\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">time<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Direct Object<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n  <span class=\"k\">for <\/span><span class=\"p\">(<\/span><span class=\"kd\">let<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">1000000<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span><span class=\"o\">++<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">obj<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">}<\/span>\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">timeEnd<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Direct Object<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">time<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Via Proxy<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n  <span class=\"k\">for <\/span><span class=\"p\">(<\/span><span class=\"kd\">let<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">1000000<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span><span class=\"o\">++<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">proxy<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">}<\/span>\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">timeEnd<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Via Proxy<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"nf\">testPerformance<\/span><span class=\"p\">();<\/span>\n<span class=\"c1\">\/\/ Typical output:<\/span>\n<span class=\"c1\">\/\/ Direct Object: ~5ms<\/span>\n<span class=\"c1\">\/\/ Via Proxy: ~50ms<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"2_%D8%B1%D9%81%D8%AA%D8%A7%D8%B1_%D8%A8%D8%A7_%D8%B1%D9%88%D8%B4%D9%87%D8%A7%DB%8C_%D8%AF%D8%A7%D8%AE%D9%84%DB%8C\"><\/span>\n<p>  2. \u0631\u0641\u062a\u0627\u0631 \u0628\u0627 \u0631\u0648\u0634\u0647\u0627\u06cc \u062f\u0627\u062e\u0644\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0631\u0648\u0634 \u0647\u0627 \u0648 \u062e\u0635\u0648\u0635\u06cc\u0627\u062a \u062f\u0627\u062e\u0644\u06cc \u06cc\u06a9 \u0634\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0637\u0648\u0631 \u063a\u06cc\u0631 \u0645\u0646\u062a\u0638\u0631\u0647 \u0627\u06cc \u062f\u0631 \u0647\u0646\u06af\u0627\u0645 \u062f\u0633\u062a\u0631\u0633\u06cc \u0627\u0632 \u0637\u0631\u06cc\u0642 \u06cc\u06a9 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0631\u0641\u062a\u0627\u0631 \u06a9\u0646\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">MyClass<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">constructor<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">42<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">}<\/span>\n\n  <span class=\"nf\">method<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">instance<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">MyClass<\/span><span class=\"p\">();<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">proxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">instance<\/span><span class=\"p\">,<\/span> <span class=\"p\">{});<\/span>\n\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">instance<\/span><span class=\"p\">.<\/span><span class=\"nf\">method<\/span><span class=\"p\">());<\/span> <span class=\"c1\">\/\/ 42<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">proxy<\/span><span class=\"p\">.<\/span><span class=\"nf\">method<\/span><span class=\"p\">());<\/span>    <span class=\"c1\">\/\/ Can cause issues if 'this' is used internally<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"3_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D9%87%D8%A7_%D8%A8%D9%87_%D8%B9%D9%86%D9%88%D8%A7%D9%86_%D9%85%D8%AB%D8%A7%D9%84_%D8%B4%D9%81%D8%A7%D9%81_%D9%86%DB%8C%D8%B3%D8%AA%D9%86%D8%AF\"><\/span>\n<p>  3. \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644 \u0634\u0641\u0627\u0641 \u0646\u06cc\u0633\u062a\u0646\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Example<\/span> <span class=\"p\">{}<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">proxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">Example<\/span><span class=\"p\">(),<\/span> <span class=\"p\">{});<\/span>\n\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">proxy<\/span> <span class=\"k\">instanceof<\/span> <span class=\"nx\">Example<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ false - this might surprise you!<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<hr\/>\n<h2><span class=\"ez-toc-section\" id=\"%D8%A7%D8%AF%D8%BA%D8%A7%D9%85_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D8%A8%D8%A7_%D8%B3%D8%A7%DB%8C%D8%B1_%D9%88%DB%8C%DA%98%DA%AF%DB%8C_%D9%87%D8%A7%DB%8C_%D9%85%D8%AF%D8%B1%D9%86\"><\/span>\n<p>  \u0627\u062f\u063a\u0627\u0645 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0628\u0627 \u0633\u0627\u06cc\u0631 \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u0645\u062f\u0631\u0646<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D8%A8%D8%A7_API_%D8%A8%D8%A7%D8%B2%D8%AA%D8%A7%D8%A8\"><\/span>\n<p>  \u067e\u0631\u0648\u06a9\u0633\u06cc \u0628\u0627 API \u0628\u0627\u0632\u062a\u0627\u0628<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>API \u0628\u0627\u0632\u062a\u0627\u0628 \u062f\u0631 \u06a9\u0646\u0627\u0631 \u067e\u0631\u0627\u06a9\u0633\u06cc \u0647\u0627 \u0645\u0639\u0631\u0641\u06cc \u0634\u062f \u0648 \u0631\u0648\u0634 \u0647\u0627\u06cc\u06cc \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u0645\u0637\u0627\u0628\u0642 \u0628\u0627 \u062a\u0644\u0647 \u0647\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc \u0627\u0633\u062a:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">object<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">a<\/span><span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"na\">b<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span> <span class=\"p\">};<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">proxy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">object<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`Accessing <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n    <span class=\"c1\">\/\/ Using Reflect.get instead of target[prop]<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">});<\/span>\n\n<span class=\"c1\">\/\/ Reflect also allows metaprogramming operations<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">ownKeys<\/span><span class=\"p\">(<\/span><span class=\"nx\">proxy<\/span><span class=\"p\">));<\/span> <span class=\"c1\">\/\/ ['a', 'b']<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D8%A8%D8%A7_%D9%86%D9%82%D8%B4%D9%87_%D8%B6%D8%B9%DB%8C%D9%81_%D8%A8%D8%B1%D8%A7%DB%8C_%D8%AF%D8%A7%D8%AF%D9%87_%D9%87%D8%A7%DB%8C_%D8%AE%D8%B5%D9%88%D8%B5%DB%8C\"><\/span>\n<p>  \u067e\u0631\u0648\u06a9\u0633\u06cc \u0628\u0627 \u0646\u0642\u0634\u0647 \u0636\u0639\u06cc\u0641 \u0628\u0631\u0627\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u062e\u0635\u0648\u0635\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0631\u0627 \u0628\u0627 \u0645\u067e \u0647\u0627\u06cc \u0636\u0639\u06cc\u0641 \u062a\u0631\u06a9\u06cc\u0628 \u06a9\u0646\u06cc\u0645 \u062a\u0627 \u062e\u0635\u0648\u0635\u06cc\u0627\u062a \u0648\u0627\u0642\u0639\u0627\u064b \u062e\u0635\u0648\u0635\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">privateData<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">WeakMap<\/span><span class=\"p\">();<\/span>\n\n<span class=\"kd\">class<\/span> <span class=\"nc\">SecureUser<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">constructor<\/span><span class=\"p\">(<\/span><span class=\"nx\">name<\/span><span class=\"p\">,<\/span> <span class=\"nx\">password<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"kd\">const<\/span> <span class=\"nx\">data<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">name<\/span><span class=\"p\">,<\/span> <span class=\"nx\">password<\/span><span class=\"p\">,<\/span> <span class=\"na\">passwordAttempts<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">};<\/span>\n    <span class=\"nx\">privateData<\/span><span class=\"p\">.<\/span><span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">,<\/span> <span class=\"nx\">data<\/span><span class=\"p\">);<\/span>\n\n    <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span>\n      <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">name<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n          <span class=\"k\">return<\/span> <span class=\"nx\">privateData<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">).<\/span><span class=\"nx\">name<\/span><span class=\"p\">;<\/span>\n        <span class=\"p\">}<\/span>\n        <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">prop<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">checkPassword<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n          <span class=\"k\">return<\/span> <span class=\"nx\">password<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n            <span class=\"kd\">const<\/span> <span class=\"nx\">data<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">privateData<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">);<\/span>\n            <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">passwordAttempts<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span>\n\n            <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">passwordAttempts<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">3<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n              <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Error<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Account locked after multiple attempts<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n            <span class=\"p\">}<\/span>\n\n            <span class=\"k\">return<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">password<\/span> <span class=\"o\">===<\/span> <span class=\"nx\">password<\/span><span class=\"p\">;<\/span>\n          <span class=\"p\">};<\/span>\n        <span class=\"p\">}<\/span>\n        <span class=\"k\">return<\/span> <span class=\"nx\">target<\/span><span class=\"p\">[<\/span><span class=\"nx\">prop<\/span><span class=\"p\">];<\/span>\n      <span class=\"p\">}<\/span>\n    <span class=\"p\">});<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">user<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">SecureUser<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">john<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">password123<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"p\">);<\/span>                <span class=\"c1\">\/\/ 'john'<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">checkPassword<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">wrong<\/span><span class=\"dl\">'<\/span><span class=\"p\">));<\/span> <span class=\"c1\">\/\/ false<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">checkPassword<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">wrong<\/span><span class=\"dl\">'<\/span><span class=\"p\">));<\/span> <span class=\"c1\">\/\/ false<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">checkPassword<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">wrong<\/span><span class=\"dl\">'<\/span><span class=\"p\">));<\/span> <span class=\"c1\">\/\/ false<\/span>\n<span class=\"c1\">\/\/ user.checkPassword('wrong');           \/\/ Error: Account locked<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nx\">password<\/span><span class=\"p\">);<\/span>              <span class=\"c1\">\/\/ undefined - not accessible<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<hr\/>\n<h2><span class=\"ez-toc-section\" id=\"%D8%A7%D9%84%DA%AF%D9%88%D9%87%D8%A7%DB%8C_%D9%BE%DB%8C%D8%B4%D8%B1%D9%81%D8%AA%D9%87_%D8%A8%D8%A7_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D9%87%D8%A7\"><\/span>\n<p>  \u0627\u0644\u06af\u0648\u0647\u0627\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0628\u0627 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%D9%85%D8%AC%D8%A7%D9%88%D8%B1%D8%AA_%D8%B9%D9%85%DB%8C%D9%82\"><\/span>\n<p>  \u0645\u062c\u0627\u0648\u0631\u062a \u0639\u0645\u06cc\u0642<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0628\u0631\u0627\u06cc \u0627\u06cc\u062c\u0627\u062f \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u06a9\u0627\u0645\u0644\u0627\u064b \u0648\u0627\u06a9\u0646\u0634\u06cc \u060c \u0628\u0627\u06cc\u062f \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0631\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0627\u0639\u0645\u0627\u0644 \u06a9\u0646\u06cc\u0645:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">deepProxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"k\">typeof<\/span> <span class=\"nx\">obj<\/span> <span class=\"o\">!==<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">object<\/span><span class=\"dl\">'<\/span> <span class=\"o\">||<\/span> <span class=\"nx\">obj<\/span> <span class=\"o\">===<\/span> <span class=\"kc\">null<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nx\">obj<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">}<\/span>\n\n  <span class=\"c1\">\/\/ Process arrays and objects recursively<\/span>\n  <span class=\"k\">for <\/span><span class=\"p\">(<\/span><span class=\"kd\">const<\/span> <span class=\"nx\">key<\/span> <span class=\"k\">of<\/span> <span class=\"nb\">Object<\/span><span class=\"p\">.<\/span><span class=\"nf\">keys<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"k\">typeof<\/span> <span class=\"nx\">obj<\/span><span class=\"p\">[<\/span><span class=\"nx\">key<\/span><span class=\"p\">]<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">object<\/span><span class=\"dl\">'<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nx\">obj<\/span><span class=\"p\">[<\/span><span class=\"nx\">key<\/span><span class=\"p\">]<\/span> <span class=\"o\">!==<\/span> <span class=\"kc\">null<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"nx\">obj<\/span><span class=\"p\">[<\/span><span class=\"nx\">key<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">deepProxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">[<\/span><span class=\"nx\">key<\/span><span class=\"p\">],<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">);<\/span>\n    <span class=\"p\">}<\/span>\n  <span class=\"p\">}<\/span>\n\n  <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Proxy<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handler<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"c1\">\/\/ Handler that logs all operations<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">logHandler<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"kd\">const<\/span> <span class=\"nx\">value<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">);<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`GET: <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nx\">value<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`SET: <\/span><span class=\"p\">${<\/span><span class=\"nx\">prop<\/span><span class=\"p\">}<\/span><span class=\"s2\"> = <\/span><span class=\"p\">${<\/span><span class=\"nx\">value<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nb\">Reflect<\/span><span class=\"p\">.<\/span><span class=\"nf\">set<\/span><span class=\"p\">(<\/span><span class=\"nx\">target<\/span><span class=\"p\">,<\/span> <span class=\"nx\">prop<\/span><span class=\"p\">,<\/span> <span class=\"nx\">value<\/span><span class=\"p\">,<\/span> <span class=\"nx\">receiver<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">data<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">deepProxy<\/span><span class=\"p\">({<\/span>\n  <span class=\"na\">user<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n    <span class=\"na\">profile<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n      <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Anna<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n      <span class=\"na\">contact<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n        <span class=\"na\">email<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">anna@example.com<\/span><span class=\"dl\">'<\/span>\n      <span class=\"p\">}<\/span>\n    <span class=\"p\">},<\/span>\n    <span class=\"na\">preferences<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n      <span class=\"na\">theme<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">dark<\/span><span class=\"dl\">'<\/span>\n    <span class=\"p\">}<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">},<\/span> <span class=\"nx\">logHandler<\/span><span class=\"p\">);<\/span>\n\n<span class=\"c1\">\/\/ Nested access tracked<\/span>\n<span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nx\">profile<\/span><span class=\"p\">.<\/span><span class=\"nx\">contact<\/span><span class=\"p\">.<\/span><span class=\"nx\">email<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ Logs all intermediate accesses<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"%D8%A7%D9%84%DA%AF%D9%88%DB%8C_%D9%BE%D8%B1%D9%88%DA%A9%D8%B3%DB%8C_%D9%87%D8%A7%DB%8C_%D9%82%D8%A7%D8%A8%D9%84_%D8%A8%D8%B1%DA%AF%D8%B4%D8%AA_%D8%A8%D8%B1%D8%A7%DB%8C_%DA%A9%D9%86%D8%AA%D8%B1%D9%84_%D8%AF%D8%B3%D8%AA%D8%B1%D8%B3%DB%8C_%D9%85%D9%88%D9%82%D8%AA\"><\/span>\n<p>  \u0627\u0644\u06af\u0648\u06cc: \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627\u06cc \u0642\u0627\u0628\u0644 \u0628\u0631\u06af\u0634\u062a \u0628\u0631\u0627\u06cc \u06a9\u0646\u062a\u0631\u0644 \u062f\u0633\u062a\u0631\u0633\u06cc \u0645\u0648\u0642\u062a<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>JavaScript \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627\u06cc \u0642\u0627\u0628\u0644 \u0628\u0627\u0632\u06af\u0634\u062a \u060c \u0628\u0631\u0627\u06cc \u0627\u0639\u0637\u0627\u06cc \u062f\u0633\u062a\u0631\u0633\u06cc \u0645\u0648\u0642\u062a \u0645\u0641\u06cc\u062f \u0628\u0627\u0634\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">createTemporaryAccess<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"nx\">timeoutMs<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">30000<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">proxy<\/span><span class=\"p\">,<\/span> <span class=\"nx\">revoke<\/span> <span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">Proxy<\/span><span class=\"p\">.<\/span><span class=\"nf\">revocable<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"p\">{});<\/span>\n\n  <span class=\"nf\">setTimeout<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Access automatically revoked<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n    <span class=\"nf\">revoke<\/span><span class=\"p\">();<\/span>\n  <span class=\"p\">},<\/span> <span class=\"nx\">timeoutMs<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"k\">return<\/span> <span class=\"nx\">proxy<\/span><span class=\"p\">;<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">sensitiveData<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">apiKey<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">12345<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">secret<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">confidential value<\/span><span class=\"dl\">'<\/span> <span class=\"p\">};<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">temporaryAccess<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createTemporaryAccess<\/span><span class=\"p\">(<\/span><span class=\"nx\">sensitiveData<\/span><span class=\"p\">,<\/span> <span class=\"mi\">5000<\/span><span class=\"p\">);<\/span>\n\n<span class=\"c1\">\/\/ Immediate use works<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">temporaryAccess<\/span><span class=\"p\">.<\/span><span class=\"nx\">apiKey<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ '12345'<\/span>\n\n<span class=\"c1\">\/\/ After 5 seconds...<\/span>\n<span class=\"nf\">setTimeout<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">temporaryAccess<\/span><span class=\"p\">.<\/span><span class=\"nx\">apiKey<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span> <span class=\"k\">catch <\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Error:<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">e<\/span><span class=\"p\">.<\/span><span class=\"nx\">message<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ TypeError: Cannot perform 'get' on a proxy that has been revoked<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">},<\/span> <span class=\"mi\">6000<\/span><span class=\"p\">);<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<hr\/>\n<h2><span class=\"ez-toc-section\" id=\"%D9%86%D8%AA%DB%8C%D8%AC%D9%87_%DA%AF%DB%8C%D8%B1%DB%8C\"><\/span>\n<p>  \u0646\u062a\u06cc\u062c\u0647 \u06af\u06cc\u0631\u06cc:<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u06cc\u06a9\u06cc \u0627\u0632 \u0642\u062f\u0631\u062a\u0645\u0646\u062f\u062a\u0631\u06cc\u0646 \u0645\u0648\u0627\u0631\u062f \u0627\u0636\u0627\u0641\u06cc \u062f\u0631 JavaScript \u0645\u062f\u0631\u0646 \u0631\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f \u060c \u0648 \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc \u06a9\u0646\u062f \u062a\u0627 \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0633\u0627\u0632\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0631\u0627 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u062f \u0648 \u0646\u062d\u0648\u0647 \u062a\u0639\u0627\u0645\u0644 \u0645\u0627 \u0628\u0627 \u0627\u0634\u06cc\u0627\u0621 \u0631\u0627 \u062a\u063a\u06cc\u06cc\u0631 \u062f\u0647\u062f. \u0686\u0627\u0631\u0686\u0648\u0628 \u0647\u0627\u06cc\u06cc \u0645\u0627\u0646\u0646\u062f vue.js \u062f\u0631 \u062d\u0627\u0644 \u062d\u0627\u0636\u0631 \u0627\u0632 \u0627\u06cc\u0646 \u0641\u0646\u0627\u0648\u0631\u06cc \u0628\u0631\u0627\u06cc \u0627\u06cc\u062c\u0627\u062f \u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc \u0648\u0627\u06a9\u0646\u0634\u06cc \u0638\u0631\u06cc\u0641 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n<p>\u0646\u06a9\u0627\u062a \u0646\u0647\u0627\u06cc\u06cc \u0628\u0631\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u0624\u062b\u0631 \u0627\u0632 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627:<\/p>\n<ol>\n<li>\n<strong>\u0627\u0632 \u06a9\u0645\u0628\u0648\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f<\/strong>: \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0631\u0627 \u0627\u0636\u0627\u0641\u0647 \u0645\u06cc \u06a9\u0646\u0646\u062f \u0648 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0631 \u0639\u0645\u0644\u06a9\u0631\u062f \u062a\u0623\u062b\u06cc\u0631 \u0628\u06af\u0630\u0627\u0631\u0646\u062f.<\/li>\n<li>\n<strong>\u0632\u0645\u06cc\u0646\u0647 \u0631\u0627 \u062f\u0631 \u0646\u0638\u0631 \u0628\u06af\u06cc\u0631\u06cc\u062f<\/strong>: \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u0647\u0627\u06cc \u0628\u062d\u0631\u0627\u0646\u06cc \u0628\u0627 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0628\u0627\u0644\u0627 \u060c \u0641\u0642\u0637 \u062f\u0631 \u062c\u0627\u06cc\u06cc \u06a9\u0647 \u0647\u0632\u06cc\u0646\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f \u0642\u0627\u0628\u0644 \u0642\u0628\u0648\u0644 \u0627\u0633\u062a \u060c \u0627\u0632 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f.<\/li>\n<li>\n<strong>\u0628\u0627 API \u0647\u0627\u06cc \u062f\u06cc\u06af\u0631 \u062a\u0631\u06a9\u06cc\u0628 \u06a9\u0646\u06cc\u062f<\/strong>: \u062a\u0623\u0645\u0644 \u060c \u0645\u067e \u0636\u0639\u06cc\u0641 \u0648 \u06a9\u0644\u0627\u0633 \u0647\u0627 \u0628\u0627 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0628\u0633\u06cc\u0627\u0631 \u062e\u0648\u0628 \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/li>\n<li>\n<strong>\u06a9\u0627\u0645\u0644\u0627\u064b \u0622\u0632\u0645\u0648\u0646<\/strong>: \u0631\u0641\u062a\u0627\u0631 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0638\u0631\u06cc\u0641 \u0628\u0627\u0634\u062f \u060c \u0628\u0647 \u062e\u0635\u0648\u0635 \u0628\u0627 \u0648\u0631\u0627\u062b\u062a \u0648 \u0631\u0648\u0634\u0647\u0627\u06cc \u062f\u0627\u062e\u0644\u06cc.<\/li>\n<\/ol>\n<p>\u0628\u0627 \u062a\u0633\u0644\u0637 \u0628\u0631 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u060c \u062f\u0631\u0647\u0627\u06cc \u0627\u0644\u06af\u0648\u0647\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0631\u0627 \u0628\u0627\u0632 \u0645\u06cc \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u06a9\u062f \u0634\u0645\u0627 \u0631\u0627 \u0642\u0648\u06cc \u062a\u0631 \u060c \u0627\u06cc\u0645\u0646 \u062a\u0631 \u0648 \u0628\u06cc\u0627\u0646 \u06a9\u0646\u062f.<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u062f\u0631 \u067e\u0634\u062a \u0635\u062d\u0646\u0647 \u0627\u0634\u06cc\u0627\u0621 JavaScript \u0627\u0628\u0632\u0627\u0631\u06cc \u0642\u062f\u0631\u062a\u0645\u0646\u062f \u0642\u0631\u0627\u0631 \u062f\u0627\u0631\u062f \u06a9\u0647 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u0647\u0631\u06af\u0648\u0646\u0647 \u062a\u0639\u0627\u0645\u0644 \u0628\u0627 \u0627\u0634\u06cc\u0627\u0621 \u0631\u0627 \u0631\u0647\u06af\u06cc\u0631\u06cc \u060c \u0627\u0635\u0644\u0627\u062d \u0648 \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u06cc\u062f. \u0628\u0647 \u062f\u0646\u06cc\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc \u062e\u0648\u0634 \u0622\u0645\u062f\u06cc\u062f. \u0645\u0642\u062f\u0645\u0647: \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0686\u06cc\u0633\u062a\u061f \u062f\u0631 JavaScript \u060c \u067e\u0631\u0627\u06a9\u0633\u06cc \u0647\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0648\u0627\u0633\u0637\u0647 \u0628\u0631\u0627\u06cc \u0627\u0634\u06cc\u0627\u0621 \u0639\u0645\u0644 \u0645\u06cc \u06a9\u0646\u0646\u062f \u0648 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f \u0631\u0641\u062a\u0627\u0631\u0647\u0627\u06cc 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