{"id":97773,"date":"2025-02-16T19:11:35","date_gmt":"2025-02-16T15:41:35","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/"},"modified":"2025-02-16T19:11:35","modified_gmt":"2025-02-16T15:41:35","slug":"20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/","title":{"rendered":"20 \u062a\u06a9\u0646\u06cc\u06a9 React.js \u0628\u0631\u0627\u06cc \u0645\u0628\u062a\u062f\u06cc\u0627\u0646 \u062f\u0631 \u0633\u0627\u0644 2025"},"content":{"rendered":"<div data-article-id=\"2282277\" id=\"article-body\">\n<p>\u0628\u0647 \u062f\u0646\u06cc\u0627\u06cc \u0647\u06cc\u062c\u0627\u0646 \u0627\u0646\u06af\u06cc\u0632 React.js \u062e\u0648\u0634 \u0622\u0645\u062f\u06cc\u062f! \u0627\u06cc\u0646 \u06a9\u0647 \u0622\u06cc\u0627 \u0634\u0645\u0627 \u062a\u0627\u0632\u0647 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\u06a9\u0644\u0627\u0633<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#4_%D9%85%D8%AF%DB%8C%D8%B1%DB%8C%D8%AA_%D8%AF%D9%88%D9%84%D8%AA\" >4 \u0645\u062f\u06cc\u0631\u06cc\u062a \u062f\u0648\u0644\u062a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#5_%D8%AD%D9%81%D8%A7%D8%B1%DB%8C_%D8%BA%D8%B1%D9%81%D9%87\" >5 \u062d\u0641\u0627\u0631\u06cc \u063a\u0631\u0641\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#6_%D8%AD%D8%A7%D9%84%D8%AA_%D8%A8%D9%84%D9%86%D8%AF_%DA%A9%D8%B1%D8%AF%D9%86\" >6 \u062d\u0627\u0644\u062a \u0628\u0644\u0646\u062f \u06a9\u0631\u062f\u0646<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#7_%D9%82%D9%84%D8%A7%D8%A8_%D8%A8%D9%87%D8%AA%D8%B1%DB%8C%D9%86_%D8%AF%D9%88%D8%B3%D8%AA%D8%A7%D9%86_%D8%AC%D8%AF%DB%8C%D8%AF_%D8%B4%D9%85%D8%A7\" >7 \u0642\u0644\u0627\u0628: \u0628\u0647\u062a\u0631\u06cc\u0646 \u062f\u0648\u0633\u062a\u0627\u0646 \u062c\u062f\u06cc\u062f \u0634\u0645\u0627<\/a><\/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\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#8_API_%D8%B2%D9%85%DB%8C%D9%86%D9%87_%D8%A8%D8%B1%D8%A7%DB%8C_%D8%AF%D9%88%D9%84%D8%AA_%D8%AC%D9%87%D8%A7%D9%86%DB%8C\" >8 API \u0632\u0645\u06cc\u0646\u0647 \u0628\u0631\u0627\u06cc \u062f\u0648\u0644\u062a \u062c\u0647\u0627\u0646\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#9_%D8%A7%D8%B1%D8%A7%D8%A6%D9%87_%D9%85%D8%B4%D8%B1%D9%88%D8%B7\" >9 \u0627\u0631\u0627\u0626\u0647 \u0645\u0634\u0631\u0648\u0637<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#10_%D9%84%DB%8C%D8%B3%D8%AA_%D9%87%D8%A7_%D9%88_%DA%A9%D9%84%DB%8C%D8%AF%D9%87%D8%A7\" >10 \u0644\u06cc\u0633\u062a \u0647\u0627 \u0648 \u06a9\u0644\u06cc\u062f\u0647\u0627<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#11_%D8%B1%D8%B3%DB%8C%D8%AF%DA%AF%DB%8C_%D8%A8%D9%87_%D8%B1%D9%88%DB%8C%D8%AF%D8%A7%D8%AF\" >11 \u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#12_%D8%A7%D8%AC%D8%B2%D8%A7%DB%8C_%DA%A9%D9%86%D8%AA%D8%B1%D9%84_%D8%B4%D8%AF%D9%87\" >12 \u0627\u062c\u0632\u0627\u06cc \u06a9\u0646\u062a\u0631\u0644 \u0634\u062f\u0647<\/a><\/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\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#13_%D9%85%D8%B1%D8%B2%D9%87%D8%A7%DB%8C_%D8%AE%D8%B7%D8%A7\" >13 \u0645\u0631\u0632\u0647\u0627\u06cc \u062e\u0637\u0627<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#14_%D8%AA%D9%82%D8%B3%DB%8C%D9%85_%DA%A9%D8%AF_%D9%88_%D8%A8%D8%A7%D8%B1%DA%AF%DB%8C%D8%B1%DB%8C_%D8%AA%D9%86%D8%A8%D9%84\" >14 \u062a\u0642\u0633\u06cc\u0645 \u06a9\u062f \u0648 \u0628\u0627\u0631\u06af\u06cc\u0631\u06cc \u062a\u0646\u0628\u0644<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#15_%D8%A7%D8%AC%D8%B2%D8%A7%DB%8C_%D9%85%D8%B1%D8%AA%D8%A8%D9%87_%D8%A8%D8%A7%D9%84%D8%A7%D8%AA%D8%B1_HOC\" >15 \u0627\u062c\u0632\u0627\u06cc \u0645\u0631\u062a\u0628\u0647 \u0628\u0627\u0644\u0627\u062a\u0631 (HOC)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#16_%D9%82%D9%84%D8%A7%D8%A8_%D9%87%D8%A7%DB%8C_%D8%B3%D9%81%D8%A7%D8%B1%D8%B4%DB%8C\" >16 \u0642\u0644\u0627\u0628 \u0647\u0627\u06cc \u0633\u0641\u0627\u0631\u0634\u06cc<\/a><\/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\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#17_%D8%B1%D9%88%D8%AA%D8%B1_%D8%A8%D8%B1%D8%A7%DB%8C_%D9%86%D8%A7%D9%88%D8%A8%D8%B1%DB%8C_%D9%88%D8%A7%DA%A9%D9%86%D8%B4_%D9%86%D8%B4%D8%A7%D9%86_%D9%85%DB%8C_%D8%AF%D9%87%D8%AF\" >17 \u0631\u0648\u062a\u0631 \u0628\u0631\u0627\u06cc \u0646\u0627\u0648\u0628\u0631\u06cc \u0648\u0627\u06a9\u0646\u0634 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#18_%D8%A7%D8%AC%D8%B2%D8%A7%DB%8C_%DB%8C%DA%A9_%D8%B8%D8%A7%D9%87%D8%B1_%D8%B7%D8%B1%D8%A7%D8%AD%DB%8C_%D8%B4%D8%AF%D9%87\" >18 \u0627\u062c\u0632\u0627\u06cc \u06cc\u06a9 \u0638\u0627\u0647\u0631 \u0637\u0631\u0627\u062d\u06cc \u0634\u062f\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#19_%D8%A2%D8%B2%D9%85%D8%A7%DB%8C%D8%B4_%D8%A8%D8%A7_%DA%A9%D8%AA%D8%A7%D8%A8%D8%AE%D8%A7%D9%86%D9%87_%D8%AA%D8%B3%D8%AA_Jest_%D9%88_React\" >19. \u0622\u0632\u0645\u0627\u06cc\u0634 \u0628\u0627 \u06a9\u062a\u0627\u0628\u062e\u0627\u0646\u0647 \u062a\u0633\u062a Jest \u0648 React<\/a><\/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\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#20_%D8%A8%D9%87%DB%8C%D9%86%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D8%B9%D9%85%D9%84%DA%A9%D8%B1%D8%AF\" >20 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/nabfollower.com\/blog\/20-must-know-reactjs-techniques-for-beginners-in-2025-2ln4\/#%D9%BE%D8%A7%DB%8C%D8%A7%D9%86\" >\u067e\u0627\u06cc\u0627\u0646<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_%D8%A7%D8%B5%D9%88%D9%84_JSX_%D8%B1%D8%A7_%D8%AF%D8%B1%DA%A9_%DA%A9%D9%86%DB%8C%D8%AF\"><\/span>\n<p>  1 <strong>\u0627\u0635\u0648\u0644 JSX \u0631\u0627 \u062f\u0631\u06a9 \u06a9\u0646\u06cc\u062f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>JSX \u06cc\u06a9 \u067e\u0633\u0648\u0646\u062f \u0646\u062d\u0648\u06cc \u0628\u0631\u0627\u06cc JavaScript \u0627\u0633\u062a \u06a9\u0647 \u0634\u0628\u06cc\u0647 XML \u06cc\u0627 HTML \u0627\u0633\u062a. \u0627\u06cc\u0646 \u06cc\u06a9 \u0628\u062e\u0634 \u0627\u0633\u0627\u0633\u06cc \u0627\u0632 React \u0627\u0633\u062a \u0648 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u06a9\u062f HTML \u0645\u0627\u0646\u0646\u062f \u0631\u0627 \u062f\u0631 JavaScript \u0628\u0646\u0648\u06cc\u0633\u06cc\u062f. JSX \u0631\u0627 \u062f\u0631 \u0622\u063a\u0648\u0634 \u0628\u06af\u06cc\u0631\u06cc\u062f \u0632\u06cc\u0631\u0627 \u0628\u0627\u0639\u062b \u0645\u06cc \u0634\u0648\u062f \u06a9\u062f \u0634\u0645\u0627 \u0642\u0627\u0628\u0644 \u062e\u0648\u0627\u0646\u062f\u0646 \u0648 \u0646\u0648\u0634\u062a\u0646 \u0622\u0633\u0627\u0646 \u062a\u0631 \u0628\u0627\u0634\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">element<\/span> <span class=\"o\">=<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Hello, world!<span class=\"p\"\/><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/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<h2><span class=\"ez-toc-section\" id=\"2_%D9%85%D8%B9%D9%85%D8%A7%D8%B1%DB%8C_%D9%85%D8%A8%D8%AA%D9%86%DB%8C_%D8%A8%D8%B1_%D9%82%D8%B7%D8%B9%D8%A7%D8%AA\"><\/span>\n<p>  2 <strong>\u0645\u0639\u0645\u0627\u0631\u06cc \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u0642\u0637\u0639\u0627\u062a<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>React \u0647\u0645\u0647 \u0686\u06cc\u0632 \u062f\u0631 \u0645\u0648\u0631\u062f \u0645\u0624\u0644\u0641\u0647 \u0647\u0627 \u0627\u0633\u062a. UI \u062e\u0648\u062f \u0631\u0627 \u0628\u0647 \u0642\u0637\u0639\u0627\u062a \u0642\u0627\u0628\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u062a\u0642\u0633\u06cc\u0645 \u06a9\u0646\u06cc\u062f \u062a\u0627 \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f \u0631\u0627 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0648 \u0628\u0633\u0627\u0632\u06cc\u062f. \u0627\u0632 \u0645\u0624\u0644\u0641\u0647 \u0647\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0628\u0644\u0648\u06a9 \u0647\u0627\u06cc \u0633\u0627\u062e\u062a\u0645\u0627\u0646\u06cc \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0647 \u0631\u0648\u0634 \u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u0645\u0648\u0646\u062a\u0627\u0698 \u0634\u0648\u0646\u062f \u060c \u0641\u06a9\u0631 \u06a9\u0646\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Welcome<\/span><span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Hello, <span class=\"si\">{<\/span><span class=\"nx\">props<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"si\">}<\/span><span class=\"p\"\/><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/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<h2><span class=\"ez-toc-section\" id=\"3_%D9%85%D8%A4%D9%84%D9%81%D9%87_%D9%87%D8%A7%DB%8C_%D8%B9%D9%85%D9%84%DA%A9%D8%B1%D8%AF%DB%8C_%D8%AF%D8%B1_%D9%85%D9%82%D8%A7%D8%A8%D9%84_%DA%A9%D9%84%D8%A7%D8%B3\"><\/span>\n<p>  3 <strong>\u0645\u0624\u0644\u0641\u0647 \u0647\u0627\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f\u06cc \u062f\u0631 \u0645\u0642\u0627\u0628\u0644 \u06a9\u0644\u0627\u0633<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0627 \u0627\u062c\u0632\u0627\u06cc \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0634\u0631\u0648\u0639 \u06a9\u0646\u06cc\u062f \u060c \u0632\u06cc\u0631\u0627 \u062f\u0631\u06a9 \u0622\u0646\u0647\u0627 \u0633\u0627\u062f\u0647 \u062a\u0631 \u0648 \u0622\u0633\u0627\u0646 \u062a\u0631 \u0627\u0633\u062a. \u067e\u0633 \u0627\u0632 \u0631\u0627\u062d\u062a \u0628\u0648\u062f\u0646 \u060c \u0627\u062c\u0632\u0627\u06cc \u06a9\u0644\u0627\u0633 \u0631\u0627 \u06a9\u0627\u0648\u0634 \u06a9\u0646\u06cc\u062f \u062a\u0627 \u0637\u06cc\u0641 \u06a9\u0627\u0645\u0644 \u0642\u0627\u0628\u0644\u06cc\u062a \u0647\u0627\u06cc React \u0631\u0627 \u062f\u0631\u06a9 \u06a9\u0646\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"c1\">\/\/ Functional Component<\/span>\n<span class=\"kd\">function<\/span> <span class=\"nf\">Greeting<\/span><span class=\"p\">({<\/span> <span class=\"nx\">name<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Hello, <span class=\"si\">{<\/span><span class=\"nx\">name<\/span><span class=\"si\">}<\/span>!<span class=\"p\"\/><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"c1\">\/\/ Class Component<\/span>\n<span class=\"kd\">class<\/span> <span class=\"nc\">Greeting<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">React<\/span><span class=\"p\">.<\/span><span class=\"nx\">Component<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">render<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Hello, <span class=\"si\">{<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">props<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"si\">}<\/span>!<span class=\"p\"\/><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/span>\n  <span class=\"p\">}<\/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<h2><span class=\"ez-toc-section\" id=\"4_%D9%85%D8%AF%DB%8C%D8%B1%DB%8C%D8%AA_%D8%AF%D9%88%D9%84%D8%AA\"><\/span>\n<p>  4 <strong>\u0645\u062f\u06cc\u0631\u06cc\u062a \u062f\u0648\u0644\u062a<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062f\u0631\u06a9 \u0648\u0636\u0639\u06cc\u062a \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645 \u0627\u0633\u062a. \u0627\u0632 <code>useState<\/code> \u0642\u0644\u0627\u0628 \u062f\u0631 \u0627\u062c\u0632\u0627\u06cc \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0648\u0636\u0639\u06cc\u062a \u0645\u062d\u0644\u06cc. \u0628\u0647 \u06cc\u0627\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u062f \u060c \u062f\u0648\u0644\u062a \u0628\u0627\u06cc\u062f \u062a\u0627 \u062d\u062f \u0627\u0645\u06a9\u0627\u0646 \u0633\u0627\u062f\u0647 \u0646\u06af\u0647 \u062f\u0627\u0634\u062a\u0647 \u0634\u0648\u062f \u062a\u0627 \u0627\u0632 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0634\u0648\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Counter<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">count<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setCount<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>You clicked <span class=\"si\">{<\/span><span class=\"nx\">count<\/span><span class=\"si\">}<\/span> times<span class=\"p\"\/><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setCount<\/span><span class=\"p\">(<\/span><span class=\"nx\">count<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\n        Click me\n      <span class=\"p\"\/><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\n    <span class=\"p\"\/><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\n  <span class=\"p\">);<\/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<h2><span class=\"ez-toc-section\" id=\"5_%D8%AD%D9%81%D8%A7%D8%B1%DB%8C_%D8%BA%D8%B1%D9%81%D9%87\"><\/span>\n<p>  5 <strong>\u062d\u0641\u0627\u0631\u06cc \u063a\u0631\u0641\u0647<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062f\u0627\u062f\u0647 \u0647\u0627 \u0631\u0627 \u0628\u06cc\u0646 \u0642\u0637\u0639\u0627\u062a \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u063a\u0631\u0641\u0647 \u0647\u0627 \u0645\u0646\u062a\u0642\u0644 \u06a9\u0646\u06cc\u062f. \u062f\u0631 \u062d\u0627\u0644\u06cc \u06a9\u0647 \u0627\u06cc\u0646 \u0633\u0627\u062f\u0647 \u0627\u0633\u062a \u060c \u0628\u0647 \u062d\u0641\u0627\u0631\u06cc \u0647\u0627\u06cc \u063a\u0631\u0641\u0647 \u062a\u0648\u062c\u0647 \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u062f &#8211; \u0627\u0632 \u063a\u0631\u0641\u0647 \u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0644\u0627\u06cc\u0647 \u0647\u0627\u06cc \u0686\u0646\u062f \u0642\u0637\u0639\u0627\u062a &#8211; \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u06a9\u062f \u0634\u0645\u0627 \u0631\u0627 \u0628\u0631\u0627\u06cc \u062d\u0641\u0638 \u0633\u062e\u062a \u062a\u0631 \u06a9\u0646\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Parent<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nc\">Child<\/span> <span class=\"na\">message<\/span><span class=\"p\">=<\/span><span class=\"s\">\"Hello from Parent!\"<\/span> <span class=\"p\">\/&gt;;<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">Child<\/span><span class=\"p\">({<\/span> <span class=\"nx\">message<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">{<\/span><span class=\"nx\">message<\/span><span class=\"si\">}<\/span><span class=\"p\"\/><span class=\"nt\">p<\/span><span class=\"p\">&gt;;<\/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<h2><span class=\"ez-toc-section\" id=\"6_%D8%AD%D8%A7%D9%84%D8%AA_%D8%A8%D9%84%D9%86%D8%AF_%DA%A9%D8%B1%D8%AF%D9%86\"><\/span>\n<p>  6 <strong>\u062d\u0627\u0644\u062a \u0628\u0644\u0646\u062f \u06a9\u0631\u062f\u0646<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u0686\u0646\u062f\u06cc\u0646 \u0645\u0624\u0644\u0641\u0647 \u0646\u06cc\u0627\u0632 \u0628\u0647 \u0628\u0647 \u0627\u0634\u062a\u0631\u0627\u06a9 \u06af\u0630\u0627\u0634\u062a\u0646 \u062f\u0648\u0644\u062a \u062f\u0627\u0631\u0646\u062f \u060c \u0622\u0646 \u0631\u0627 \u0628\u0647 \u0646\u0632\u062f\u06cc\u06a9\u062a\u0631\u06cc\u0646 \u062c\u062f \u0645\u0634\u062a\u0631\u06a9 \u062e\u0648\u062f \u0628\u0644\u0646\u062f \u06a9\u0646\u06cc\u062f. \u0627\u06cc\u0646 \u062a\u06a9\u0646\u06cc\u06a9 \u0628\u0647 \u062d\u0641\u0638 \u06cc\u06a9 \u0645\u0646\u0628\u0639 \u062d\u0642\u06cc\u0642\u062a \u0628\u0631\u0627\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0634\u0645\u0627 \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Parent<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">count<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setCount<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nc\">Child<\/span> <span class=\"na\">count<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">count<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setCount<\/span><span class=\"p\">(<\/span><span class=\"nx\">count<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>Increment<span class=\"p\"\/><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\n    <span class=\"p\"\/><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\n  <span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">Child<\/span><span class=\"p\">({<\/span> <span class=\"nx\">count<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>Count: <span class=\"si\">{<\/span><span class=\"nx\">count<\/span><span class=\"si\">}<\/span><span class=\"p\"\/><span class=\"nt\">p<\/span><span class=\"p\">&gt;;<\/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<h2><span class=\"ez-toc-section\" id=\"7_%D9%82%D9%84%D8%A7%D8%A8_%D8%A8%D9%87%D8%AA%D8%B1%DB%8C%D9%86_%D8%AF%D9%88%D8%B3%D8%AA%D8%A7%D9%86_%D8%AC%D8%AF%DB%8C%D8%AF_%D8%B4%D9%85%D8%A7\"><\/span>\n<p>  7 <strong>\u0642\u0644\u0627\u0628: \u0628\u0647\u062a\u0631\u06cc\u0646 \u062f\u0648\u0633\u062a\u0627\u0646 \u062c\u062f\u06cc\u062f \u0634\u0645\u0627<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0642\u0644\u0627\u0628 \u0645\u0627\u0646\u0646\u062f <code>useEffect<\/code>\u0628\u0627 <code>useContext<\/code>\u060c \u0648 \u0642\u0644\u0627\u0628 \u0647\u0627\u06cc \u0633\u0641\u0627\u0631\u0634\u06cc \u062a\u063a\u06cc\u06cc\u0631 \u062f\u0647\u0646\u062f\u0647 \u0628\u0627\u0632\u06cc \u0647\u0633\u062a\u0646\u062f. \u0622\u0646\u0647\u0627 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f \u0627\u0632 \u062d\u0627\u0644\u062a \u0648 \u0633\u0627\u06cc\u0631 \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc React \u062f\u0631 \u0645\u0624\u0644\u0641\u0647 \u0647\u0627\u06cc \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f \u0648 \u06a9\u062f \u0634\u0645\u0627 \u0631\u0627 \u0645\u062e\u062a\u0635\u0631 \u062a\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Example<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">count<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setCount<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nb\">document<\/span><span class=\"p\">.<\/span><span class=\"nx\">title<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">`You clicked <\/span><span class=\"p\">${<\/span><span class=\"nx\">count<\/span><span class=\"p\">}<\/span><span class=\"s2\"> times`<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">count<\/span><span class=\"p\">]);<\/span>\n\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>You clicked <span class=\"si\">{<\/span><span class=\"nx\">count<\/span><span class=\"si\">}<\/span> times<span class=\"p\"\/><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setCount<\/span><span class=\"p\">(<\/span><span class=\"nx\">count<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\n        Click me\n      <span class=\"p\"\/><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\n    <span class=\"p\"\/><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\n  <span class=\"p\">);<\/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<h2><span class=\"ez-toc-section\" id=\"8_API_%D8%B2%D9%85%DB%8C%D9%86%D9%87_%D8%A8%D8%B1%D8%A7%DB%8C_%D8%AF%D9%88%D9%84%D8%AA_%D8%AC%D9%87%D8%A7%D9%86%DB%8C\"><\/span>\n<p>  8 <strong>API \u0632\u0645\u06cc\u0646\u0647 \u0628\u0631\u0627\u06cc \u062f\u0648\u0644\u062a \u062c\u0647\u0627\u0646\u06cc<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u062f\u0648\u0644\u062a \u062c\u0647\u0627\u0646\u06cc \u060c API \u0632\u0645\u06cc\u0646\u0647 \u06cc\u06a9 \u0646\u062c\u0627\u062a \u062f\u0647\u0646\u062f\u0647 \u0627\u0633\u062a. \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0628\u0647 \u0634\u0645\u0627 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0631\u0627 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u062f\u0631\u062e\u062a \u0645\u0624\u0644\u0641\u0647 \u0639\u0628\u0648\u0631 \u062f\u0647\u06cc\u062f \u0628\u062f\u0648\u0646 \u0627\u06cc\u0646\u06a9\u0647 \u062f\u0631 \u0647\u0631 \u0633\u0637\u062d \u0628\u0647 \u0635\u0648\u0631\u062a \u062f\u0633\u062a\u06cc \u0628\u0647 \u0635\u0648\u0631\u062a \u062f\u0633\u062a\u06cc \u0639\u0628\u0648\u0631 \u06a9\u0646\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">MyContext<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createContext<\/span><span class=\"p\">();<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">Parent<\/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=\"dl\">\"<\/span><span class=\"s2\">Hello from Context!<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nc\">MyContext<\/span><span class=\"p\">.<\/span><span class=\"nc\">Provider<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">value<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nc\">Child<\/span> <span class=\"p\">\/&gt;<\/span>\n    <span class=\"p\"\/><span class=\"nc\">MyContext<\/span><span class=\"p\">.<\/span><span class=\"nc\">Provider<\/span><span class=\"p\">&gt;<\/span>\n  <span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">Child<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nc\">GrandChild<\/span> <span class=\"p\">\/&gt;;<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">GrandChild<\/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=\"nf\">useContext<\/span><span class=\"p\">(<\/span><span class=\"nx\">MyContext<\/span><span class=\"p\">);<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">p<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">{<\/span><span class=\"nx\">value<\/span><span class=\"si\">}<\/span><span class=\"p\"\/><span class=\"nt\">p<\/span><span class=\"p\">&gt;;<\/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<h2><span class=\"ez-toc-section\" id=\"9_%D8%A7%D8%B1%D8%A7%D8%A6%D9%87_%D9%85%D8%B4%D8%B1%D9%88%D8%B7\"><\/span>\n<p>  9 <strong>\u0627\u0631\u0627\u0626\u0647 \u0645\u0634\u0631\u0648\u0637<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u062c\u0632\u0627\u06cc \u0627\u0631\u0627\u0626\u0647 \u0634\u062f\u0647 \u0628\u0647 \u0637\u0648\u0631 \u0645\u0634\u0631\u0648\u0637 \u0628\u0631 \u0627\u0633\u0627\u0633 \u062d\u0627\u0644\u062a \u06cc\u0627 \u063a\u0631\u0641\u0647 \u0647\u0627. \u0627\u0632 \u0627\u067e\u0631\u0627\u062a\u0648\u0631\u0647\u0627\u06cc \u0645\u0646\u0637\u0642\u06cc JavaScript \u0628\u0631\u0627\u06cc \u06a9\u0646\u062a\u0631\u0644 \u0622\u0646\u0686\u0647 \u0646\u0645\u0627\u06cc\u0634 \u062f\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f \u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f \u0648 UI \u062e\u0648\u062f \u0631\u0627 \u067e\u0648\u06cc\u0627 \u0648 \u067e\u0627\u0633\u062e\u06af\u0648 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Greeting<\/span><span class=\"p\">({<\/span> <span class=\"nx\">isLoggedIn<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"nx\">isLoggedIn<\/span> <span class=\"p\">?<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Welcome back!<span class=\"p\"\/><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span> <span class=\"p\">:<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Please sign up.<span class=\"p\"\/><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/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<h2><span class=\"ez-toc-section\" id=\"10_%D9%84%DB%8C%D8%B3%D8%AA_%D9%87%D8%A7_%D9%88_%DA%A9%D9%84%DB%8C%D8%AF%D9%87%D8%A7\"><\/span>\n<p>  10 <strong>\u0644\u06cc\u0633\u062a \u0647\u0627 \u0648 \u06a9\u0644\u06cc\u062f\u0647\u0627<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0647\u0646\u06af\u0627\u0645 \u0627\u0631\u0627\u0626\u0647 \u0644\u06cc\u0633\u062a \u0647\u0627 \u060c \u0647\u0645\u06cc\u0634\u0647 \u06cc\u06a9 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0627\u0631\u0627\u0626\u0647 \u062f\u0647\u06cc\u062f <code>key<\/code> \u0628\u0647 \u0647\u0631 \u0639\u0646\u0635\u0631 \u0627\u062e\u062a\u0635\u0627\u0635 \u062f\u0647\u06cc\u062f. \u0627\u06cc\u0646 \u0628\u0647 \u0648\u0627\u06a9\u0646\u0634 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u06a9\u062f\u0627\u0645 \u0645\u0648\u0627\u0631\u062f \u0631\u0627 \u062a\u063a\u06cc\u06cc\u0631 \u062f\u0627\u062f\u0647 \u060c \u0627\u0636\u0627\u0641\u0647 \u0634\u062f\u0647 \u06cc\u0627 \u062d\u0630\u0641 \u0634\u062f\u0647 \u0627\u0646\u062f \u060c \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0631\u0648\u0646\u062f \u0627\u0631\u0627\u0626\u0647.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">ItemList<\/span><span class=\"p\">({<\/span> <span class=\"nx\">items<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">ul<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"si\">{<\/span><span class=\"nx\">items<\/span><span class=\"p\">.<\/span><span class=\"nf\">map<\/span><span class=\"p\">((<\/span><span class=\"nx\">item<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">(<\/span>\n        <span class=\"p\">&lt;<\/span><span class=\"nt\">li<\/span> <span class=\"na\">key<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">item<\/span><span class=\"p\">.<\/span><span class=\"nx\">id<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">{<\/span><span class=\"nx\">item<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"si\">}<\/span><span class=\"p\"\/><span class=\"nt\">li<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">))<\/span><span class=\"si\">}<\/span>\n    <span class=\"p\"\/><span class=\"nt\">ul<\/span><span class=\"p\">&gt;<\/span>\n  <span class=\"p\">);<\/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<h2><span class=\"ez-toc-section\" id=\"11_%D8%B1%D8%B3%DB%8C%D8%AF%DA%AF%DB%8C_%D8%A8%D9%87_%D8%B1%D9%88%DB%8C%D8%AF%D8%A7%D8%AF\"><\/span>\n<p>  11 <strong>\u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u0648\u0642\u0627\u06cc\u0639 \u062f\u0631 React \u0633\u0627\u062f\u0647 \u0627\u0633\u062a. \u06af\u06cc\u0631\u0646\u062f\u0647 \u0647\u0627\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u062e\u0648\u062f \u0631\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u062a\u0648\u0627\u0628\u0639 \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0646\u06cc\u062f \u0648 \u0622\u0646\u0647\u0627 \u0631\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u063a\u0631\u0641\u0647 \u0628\u0647 \u0627\u062c\u0632\u0627\u06cc \u062e\u0648\u062f \u0645\u0646\u062a\u0642\u0644 \u06a9\u0646\u06cc\u062f. \u0628\u0647 \u06cc\u0627\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u062f \u06a9\u0647 \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u0645\u0635\u0646\u0648\u0639\u06cc \u0627\u0631\u0627\u0626\u0647 \u0634\u062f\u0647 \u062a\u0648\u0633\u0637 React \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Button<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">handleClick<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nf\">alert<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Button clicked!<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">};<\/span>\n\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">handleClick<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>Click me<span class=\"p\"\/><span class=\"nt\">button<\/span><span class=\"p\">&gt;;<\/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<h2><span class=\"ez-toc-section\" id=\"12_%D8%A7%D8%AC%D8%B2%D8%A7%DB%8C_%DA%A9%D9%86%D8%AA%D8%B1%D9%84_%D8%B4%D8%AF%D9%87\"><\/span>\n<p>  12 <strong>\u0627\u062c\u0632\u0627\u06cc \u06a9\u0646\u062a\u0631\u0644 \u0634\u062f\u0647<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0631\u0627\u06cc \u0648\u0631\u0648\u062f\u06cc \u0647\u0627\u06cc \u0641\u0631\u0645 \u0627\u0632 \u0627\u062c\u0632\u0627\u06cc \u06a9\u0646\u062a\u0631\u0644 \u0634\u062f\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f. \u0628\u0627 \u0646\u06af\u0647 \u062f\u0627\u0634\u062a\u0646 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0641\u0631\u0645 \u062f\u0631 \u062d\u0627\u0644\u062a \u0645\u0624\u0644\u0641\u0647 \u060c \u06cc\u06a9 \u0645\u0646\u0628\u0639 \u062d\u0642\u06cc\u0642\u062a \u0648\u0627\u062d\u062f \u062f\u0627\u0631\u06cc\u062f \u0648 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0648 \u0627\u0639\u062a\u0628\u0627\u0631 \u0622\u0646 \u0631\u0627 \u0622\u0633\u0627\u0646 \u062a\u0631 \u0645\u06cc \u06a9\u0646\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">Form<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">name<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setName<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"dl\">''<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"kd\">const<\/span> <span class=\"nx\">handleChange<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"nx\">event<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nf\">setName<\/span><span class=\"p\">(<\/span><span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">target<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">};<\/span>\n\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">input<\/span> <span class=\"na\">type<\/span><span class=\"p\">=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">name<\/span><span class=\"si\">}<\/span> <span class=\"na\">onChange<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">handleChange<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\n  <span class=\"p\">);<\/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<h2><span class=\"ez-toc-section\" id=\"13_%D9%85%D8%B1%D8%B2%D9%87%D8%A7%DB%8C_%D8%AE%D8%B7%D8%A7\"><\/span>\n<p>  13 <strong>\u0645\u0631\u0632\u0647\u0627\u06cc \u062e\u0637\u0627<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0645\u0631\u0632\u0647\u0627\u06cc \u062e\u0637\u0627 \u062e\u0637\u0627\u0647\u0627\u06cc \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0631\u0627 \u062f\u0631 \u0647\u0631 \u0646\u0642\u0637\u0647 \u0627\u0632 \u062f\u0631\u062e\u062a \u0645\u0624\u0644\u0641\u0647 \u06a9\u0648\u062f\u06a9 \u062e\u0648\u062f \u0642\u0631\u0627\u0631 \u0645\u06cc \u062f\u0647\u062f \u060c \u0622\u0646 \u062e\u0637\u0627\u0647\u0627 \u0631\u0627 \u0648\u0627\u0631\u062f \u0645\u06cc \u06a9\u0646\u062f \u0648 \u0628\u0647 \u062c\u0627\u06cc \u062f\u0631\u062e\u062a \u0645\u0624\u0644\u0641\u0647 \u0627\u06cc \u06a9\u0647 \u062e\u0631\u0627\u0628 \u0634\u062f\u0647 \u0627\u0633\u062a \u060c \u06cc\u06a9 UI \u0628\u0631\u06af\u0634\u062a\u06cc \u0631\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f. \u0622\u0646\u0647\u0627 \u0628\u0627 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u062e\u0631\u0627\u0628\u06cc \u06a9\u0644 \u0628\u0631\u0646\u0627\u0645\u0647 \u060c \u062a\u062c\u0631\u0628\u0647 \u06a9\u0627\u0631\u0628\u0631 \u0631\u0627 \u0628\u0647\u0628\u0648\u062f \u0645\u06cc \u0628\u062e\u0634\u0646\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">ErrorBoundary<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">React<\/span><span class=\"p\">.<\/span><span class=\"nx\">Component<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">constructor<\/span><span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">super<\/span><span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">state<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">hasError<\/span><span class=\"p\">:<\/span> <span class=\"kc\">false<\/span> <span class=\"p\">};<\/span>\n  <span class=\"p\">}<\/span>\n\n  <span class=\"kd\">static<\/span> <span class=\"nf\">getDerivedStateFromError<\/span><span class=\"p\">(<\/span><span class=\"nx\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">hasError<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span> <span class=\"p\">};<\/span>\n  <span class=\"p\">}<\/span>\n\n  <span class=\"nf\">componentDidCatch<\/span><span class=\"p\">(<\/span><span class=\"nx\">error<\/span><span class=\"p\">,<\/span> <span class=\"nx\">errorInfo<\/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\">error<\/span><span class=\"p\">,<\/span> <span class=\"nx\">errorInfo<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">}<\/span>\n\n  <span class=\"nf\">render<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">hasError<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Something went wrong.<span class=\"p\"\/><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/span>\n    <span class=\"p\">}<\/span>\n\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">props<\/span><span class=\"p\">.<\/span><span class=\"nx\">children<\/span><span class=\"p\">;<\/span>\n  <span class=\"p\">}<\/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<h2><span class=\"ez-toc-section\" id=\"14_%D8%AA%D9%82%D8%B3%DB%8C%D9%85_%DA%A9%D8%AF_%D9%88_%D8%A8%D8%A7%D8%B1%DA%AF%DB%8C%D8%B1%DB%8C_%D8%AA%D9%86%D8%A8%D9%84\"><\/span>\n<p>  14 <strong>\u062a\u0642\u0633\u06cc\u0645 \u06a9\u062f \u0648 \u0628\u0627\u0631\u06af\u06cc\u0631\u06cc \u062a\u0646\u0628\u0644<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0639\u0645\u0644\u06a9\u0631\u062f \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f \u0631\u0627 \u0628\u0627 \u062a\u0642\u0633\u06cc\u0645 \u06a9\u062f \u0648 \u0628\u0627\u0631\u06af\u06cc\u0631\u06cc \u062a\u0646\u0628\u0644 \u0628\u0647\u0628\u0648\u062f \u0628\u062e\u0634\u06cc\u062f. \u0627\u0632 React \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f <code>React.lazy<\/code> \u0648\u062a <code>Suspense<\/code> \u0628\u0631\u0627\u06cc \u0628\u0627\u0631\u06af\u06cc\u0631\u06cc \u0642\u0637\u0639\u0627\u062a \u0641\u0642\u0637 \u062f\u0631 \u0635\u0648\u0631\u062a \u0646\u06cc\u0627\u0632 \u060c \u06a9\u0627\u0647\u0634 \u0632\u0645\u0627\u0646 \u0628\u0627\u0631 \u0627\u0648\u0644\u06cc\u0647.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">LazyComponent<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">lazy<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"k\">import<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/LazyComponent<\/span><span class=\"dl\">'<\/span><span class=\"p\">));<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nc\">React<\/span><span class=\"p\">.<\/span><span class=\"nc\">Suspense<\/span> <span class=\"na\">fallback<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>Loading...<span class=\"p\"\/><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nc\">LazyComponent<\/span> <span class=\"p\">\/&gt;<\/span>\n    <span class=\"p\"\/><span class=\"nc\">React<\/span><span class=\"p\">.<\/span><span class=\"nc\">Suspense<\/span><span class=\"p\">&gt;<\/span>\n  <span class=\"p\">);<\/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<h2><span class=\"ez-toc-section\" id=\"15_%D8%A7%D8%AC%D8%B2%D8%A7%DB%8C_%D9%85%D8%B1%D8%AA%D8%A8%D9%87_%D8%A8%D8%A7%D9%84%D8%A7%D8%AA%D8%B1_HOC\"><\/span>\n<p>  15 <strong>\u0627\u062c\u0632\u0627\u06cc \u0645\u0631\u062a\u0628\u0647 \u0628\u0627\u0644\u0627\u062a\u0631 (HOC)<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>HOCS \u0627\u0644\u06af\u0648\u06cc\u06cc \u0628\u0631\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u0627\u0632 \u0645\u0646\u0637\u0642 \u0645\u0624\u0644\u0641\u0647 \u0627\u0633\u062a. \u0622\u0646\u0647\u0627 \u06cc\u06a9 \u0645\u0624\u0644\u0641\u0647 \u0631\u0627 \u0645\u06cc \u06af\u06cc\u0631\u0646\u062f \u0648 \u06cc\u06a9 \u0645\u0624\u0644\u0641\u0647 \u062c\u062f\u06cc\u062f \u0631\u0627 \u0628\u0627 \u0642\u0627\u0628\u0644\u06cc\u062a \u0647\u0627\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u060c \u062a\u0631\u0648\u06cc\u062c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u0627\u0632 \u06a9\u062f \u0648 \u062c\u062f\u0627\u0633\u0627\u0632\u06cc \u0646\u06af\u0631\u0627\u0646\u06cc \u0647\u0627 \u0628\u0627\u0632 \u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u0646\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">withLogger<\/span><span class=\"p\">(<\/span><span class=\"nx\">WrappedComponent<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">extends<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nx\">Component<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nf\">componentDidMount<\/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\">Component mounted<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n    <span class=\"p\">}<\/span>\n\n    <span class=\"nf\">render<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nc\">WrappedComponent<\/span> <span class=\"si\">{<\/span><span class=\"p\">...<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">props<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;;<\/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\">EnhancedComponent<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">withLogger<\/span><span class=\"p\">(<\/span><span class=\"nx\">MyComponent<\/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<h2><span class=\"ez-toc-section\" id=\"16_%D9%82%D9%84%D8%A7%D8%A8_%D9%87%D8%A7%DB%8C_%D8%B3%D9%81%D8%A7%D8%B1%D8%B4%DB%8C\"><\/span>\n<p>  16 <strong>\u0642\u0644\u0627\u0628 \u0647\u0627\u06cc \u0633\u0641\u0627\u0631\u0634\u06cc<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0642\u0644\u0627\u0628 \u0647\u0627\u06cc \u0633\u0641\u0627\u0631\u0634\u06cc \u0631\u0627 \u0628\u0631\u0627\u06cc \u0645\u062d\u0627\u0635\u0631\u0647 \u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u0627\u0632 \u0645\u0646\u0637\u0642 \u062d\u0627\u0644\u062a \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f. \u0622\u0646\u0647\u0627 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f \u0645\u0646\u0637\u0642 \u0645\u0624\u0644\u0641\u0647 \u0631\u0627 \u062f\u0631 \u062a\u0648\u0627\u0628\u0639 \u0642\u0627\u0628\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u0627\u0633\u062a\u062e\u0631\u0627\u062c \u06a9\u0646\u06cc\u062f \u0648 \u0627\u062c\u0632\u0627\u06cc \u062e\u0648\u062f \u0631\u0627 \u062a\u0645\u06cc\u0632 \u062a\u0631 \u0648 \u0645\u062a\u0645\u0631\u06a9\u0632 \u062a\u0631 \u06a9\u0646\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">useWindowWidth<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">width<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setWidth<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nx\">innerWidth<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n    <span class=\"kd\">const<\/span> <span class=\"nx\">handleResize<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setWidth<\/span><span class=\"p\">(<\/span><span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nx\">innerWidth<\/span><span class=\"p\">);<\/span>\n    <span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nf\">addEventListener<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">resize<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handleResize<\/span><span class=\"p\">);<\/span>\n    <span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nf\">removeEventListener<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">resize<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handleResize<\/span><span class=\"p\">);<\/span>\n  <span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\n\n  <span class=\"k\">return<\/span> <span class=\"nx\">width<\/span><span class=\"p\">;<\/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<h2><span class=\"ez-toc-section\" id=\"17_%D8%B1%D9%88%D8%AA%D8%B1_%D8%A8%D8%B1%D8%A7%DB%8C_%D9%86%D8%A7%D9%88%D8%A8%D8%B1%DB%8C_%D9%88%D8%A7%DA%A9%D9%86%D8%B4_%D9%86%D8%B4%D8%A7%D9%86_%D9%85%DB%8C_%D8%AF%D9%87%D8%AF\"><\/span>\n<p>  17 <strong>\u0631\u0648\u062a\u0631 \u0628\u0631\u0627\u06cc \u0646\u0627\u0648\u0628\u0631\u06cc \u0648\u0627\u06a9\u0646\u0634 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0631\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0647\u0627\u06cc \u062a\u06a9 \u0635\u0641\u062d\u0647 \u0627\u06cc \u060c \u0631\u0648\u062a\u0631 React \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a. \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0628\u0647 \u0634\u0645\u0627 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0645\u0633\u06cc\u0631\u0647\u0627 \u0631\u0627 \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0631\u062f\u0647 \u0648 \u0628\u06cc\u0646 \u062f\u06cc\u062f\u06af\u0627\u0647\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u062d\u0631\u06a9\u062a \u06a9\u0646\u06cc\u062f \u0648 \u06cc\u06a9 \u062a\u062c\u0631\u0628\u0647 \u06a9\u0627\u0631\u0628\u0631 \u0628\u062f\u0648\u0646 \u062f\u0631\u0632 \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u062f\u0647\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">BrowserRouter<\/span> <span class=\"k\">as<\/span> <span class=\"nx\">Router<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Route<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Switch<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react-router-dom<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\n    <span class=\"p\">&lt;<\/span><span class=\"nc\">Router<\/span><span class=\"p\">&gt;<\/span>\n      <span class=\"p\">&lt;<\/span><span class=\"nc\">Switch<\/span><span class=\"p\">&gt;<\/span>\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Route<\/span> <span class=\"na\">path<\/span><span class=\"p\">=<\/span><span class=\"s\">\"https:\/\/dev.to\/about\"<\/span> <span class=\"na\">component<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">About<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">Route<\/span> <span class=\"na\">path<\/span><span class=\"p\">=<\/span><span class=\"s\">\"\/home\"<\/span> <span class=\"na\">component<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">Home<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\n      <span class=\"p\"\/><span class=\"nc\">Switch<\/span><span class=\"p\">&gt;<\/span>\n    <span class=\"p\"\/><span class=\"nc\">Router<\/span><span class=\"p\">&gt;<\/span>\n  <span class=\"p\">);<\/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<h2><span class=\"ez-toc-section\" id=\"18_%D8%A7%D8%AC%D8%B2%D8%A7%DB%8C_%DB%8C%DA%A9_%D8%B8%D8%A7%D9%87%D8%B1_%D8%B7%D8%B1%D8%A7%D8%AD%DB%8C_%D8%B4%D8%AF%D9%87\"><\/span>\n<p>  18 <strong>\u0627\u062c\u0632\u0627\u06cc \u06cc\u06a9 \u0638\u0627\u0647\u0631 \u0637\u0631\u0627\u062d\u06cc \u0634\u062f\u0647<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u06af\u0632\u06cc\u0646\u0647 \u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u06cc\u06a9 \u0638\u0627\u0647\u0631 \u0637\u0631\u0627\u062d\u06cc \u0634\u062f\u0647 \u0645\u0627\u0646\u0646\u062f \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc CSS \u060c \u0627\u062c\u0632\u0627\u06cc \u06cc\u06a9 \u0638\u0627\u0647\u0631 \u0637\u0631\u0627\u062d\u06cc \u0634\u062f\u0647 \u06cc\u0627 \u062d\u062a\u06cc CSS \u0633\u0627\u062f\u0647 \u0631\u0627 \u06a9\u0627\u0648\u0634 \u06a9\u0646\u06cc\u062f. \u06cc\u06a9\u06cc \u0631\u0627 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u0645\u062a\u0646\u0627\u0633\u0628 \u0628\u0627 \u0646\u06cc\u0627\u0632\u0647\u0627\u06cc \u067e\u0631\u0648\u0698\u0647 \u0648 \u062a\u0631\u062c\u06cc\u062d\u0627\u062a \u062a\u06cc\u0645 \u0634\u0645\u0627 \u0628\u0627\u0634\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"c1\">\/\/ Using styled-components<\/span>\n<span class=\"k\">import<\/span> <span class=\"nx\">styled<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">styled-components<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">Button<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">styled<\/span><span class=\"p\">.<\/span><span class=\"nx\">button<\/span><span class=\"s2\">`\n  background-color: blue;\n  color: white;\n`<\/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<h2><span class=\"ez-toc-section\" id=\"19_%D8%A2%D8%B2%D9%85%D8%A7%DB%8C%D8%B4_%D8%A8%D8%A7_%DA%A9%D8%AA%D8%A7%D8%A8%D8%AE%D8%A7%D9%86%D9%87_%D8%AA%D8%B3%D8%AA_Jest_%D9%88_React\"><\/span>\n<p>  19. <strong>\u0622\u0632\u0645\u0627\u06cc\u0634 \u0628\u0627 \u06a9\u062a\u0627\u0628\u062e\u0627\u0646\u0647 \u062a\u0633\u062a Jest \u0648 React<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062a\u0633\u062a \u0647\u0627 \u0631\u0627 \u0628\u0646\u0648\u06cc\u0633\u06cc\u062f \u062a\u0627 \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u062d\u0627\u0635\u0644 \u0634\u0648\u062f \u06a9\u0647 \u0627\u062c\u0632\u0627\u06cc \u0634\u0645\u0627 \u0645\u0637\u0627\u0628\u0642 \u0622\u0646\u0686\u0647 \u0627\u0646\u062a\u0638\u0627\u0631 \u0645\u06cc \u0631\u0648\u062f \u06a9\u0627\u0631 \u06a9\u0646\u0646\u062f. \u06a9\u062a\u0627\u0628\u062e\u0627\u0646\u0647 \u062a\u0633\u062a Jest \u0648 React \u06af\u0632\u06cc\u0646\u0647 \u0647\u0627\u06cc \u0645\u062d\u0628\u0648\u0628 \u0627\u0633\u062a \u06a9\u0647 \u0628\u0647 \u062e\u0648\u0628\u06cc \u0628\u0627 React \u0627\u062f\u063a\u0627\u0645 \u0645\u06cc \u0634\u0648\u062f \u0648 \u0628\u0647 \u0634\u0645\u0627 \u062f\u0631 \u06af\u0631\u0641\u062a\u0646 \u0632\u0648\u062f\u0631\u0633 \u0627\u0634\u06a9\u0627\u0644\u0627\u062a \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">render<\/span><span class=\"p\">,<\/span> <span class=\"nx\">screen<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@testing-library\/react<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n<span class=\"k\">import<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@testing-library\/jest-dom\/extend-expect<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n<span class=\"k\">import<\/span> <span class=\"nx\">App<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/App<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n\n<span class=\"nf\">test<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">renders learn react link<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nf\">render<\/span><span class=\"p\">(&lt;<\/span><span class=\"nc\">App<\/span> <span class=\"p\">\/&gt;);<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">linkElement<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">screen<\/span><span class=\"p\">.<\/span><span class=\"nf\">getByText<\/span><span class=\"p\">(<\/span><span class=\"sr\">\/learn react\/i<\/span><span class=\"p\">);<\/span>\n  <span class=\"nf\">expect<\/span><span class=\"p\">(<\/span><span class=\"nx\">linkElement<\/span><span class=\"p\">).<\/span><span class=\"nf\">toBeInTheDocument<\/span><span class=\"p\">();<\/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<h2><span class=\"ez-toc-section\" id=\"20_%D8%A8%D9%87%DB%8C%D9%86%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D8%B9%D9%85%D9%84%DA%A9%D8%B1%D8%AF\"><\/span>\n<p>  20 <strong>\u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0639\u0645\u0644\u06a9\u0631\u062f \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f \u0631\u0627 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u06a9\u0646\u06cc\u06a9 \u0647\u0627\u06cc\u06cc \u0645\u0627\u0646\u0646\u062f Memoization \u0628\u0627 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0646\u06cc\u062f <code>React.memo<\/code> \u0648\u062a <code>useMemo<\/code>\u060c \u0648 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0628\u0627\u0632\u067e\u0631\u062f\u0627\u062e\u062a \u0645\u062c\u062f\u062f \u063a\u06cc\u0631 \u0636\u0631\u0648\u0631\u06cc. \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f \u0631\u0627 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u062f\u0627\u062e\u0644\u06cc React \u0628\u0631\u0627\u06cc \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u062a\u0646\u06af\u0646\u0627\u0647\u0627 \u0645\u0634\u062e\u0635 \u06a9\u0646\u06cc\u062f.<\/p>\n<p><strong>\u0645\u062b\u0627\u0644:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight jsx\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">MyComponent<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">memo<\/span><span class=\"p\">(({<\/span> <span class=\"nx\">data<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">{<\/span><span class=\"nx\">data<\/span><span class=\"si\">}<\/span><span class=\"p\"\/><span class=\"nt\">div<\/span><span class=\"p\">&gt;;<\/span>\n<span class=\"p\">});<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nf\">Parent<\/span><span class=\"p\">({<\/span> <span class=\"nx\">data<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">memoizedData<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useMemo<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">expensiveComputation<\/span><span class=\"p\">(<\/span><span class=\"nx\">data<\/span><span class=\"p\">),<\/span> <span class=\"p\">[<\/span><span class=\"nx\">data<\/span><span class=\"p\">]);<\/span>\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nc\">MyComponent<\/span> <span class=\"na\">data<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">memoizedData<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;;<\/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<p>\u0639\u0627\u0644\u06cc! \u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u062e\u0648\u0627\u0646\u0646\u062f\u06af\u0627\u0646 \u0631\u0627 \u062a\u0631\u063a\u06cc\u0628 \u06a9\u0646\u06cc\u062f \u062a\u0627 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u0645\u0627\u0633 \u0628\u0647 \u0627\u0642\u062f\u0627\u0645 \u062f\u0631 \u067e\u0633\u062a \u0648\u0628\u0644\u0627\u06af \u062e\u0648\u062f \u060c \u062d\u0633\u0627\u0628 GitHub \u062e\u0648\u062f \u0631\u0627 \u062f\u0646\u0628\u0627\u0644 \u06a9\u0646\u0646\u062f. \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0622\u0646 \u0631\u0627 \u062f\u0631 \u0646\u062a\u06cc\u062c\u0647 \u0648\u0628\u0644\u0627\u06af \u062e\u0648\u062f \u0627\u062f\u063a\u0627\u0645 \u06a9\u0646\u06cc\u062f:<\/p>\n<hr\/>\n<h2><span class=\"ez-toc-section\" id=\"%D9%BE%D8%A7%DB%8C%D8%A7%D9%86\"><\/span>\n<p>  \u067e\u0627\u06cc\u0627\u0646<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062a\u0628\u0631\u06cc\u06a9 \u0645\u06cc \u06af\u0648\u06cc\u0645 \u06a9\u0647 \u0627\u0648\u0644\u06cc\u0646 \u0642\u062f\u0645 \u0647\u0627 \u0631\u0627 \u0628\u0647 \u062f\u0646\u06cc\u0627\u06cc React.js \u0628\u0631\u062f\u0627\u0634\u062a\u0647 \u0627\u06cc\u062f! \u0628\u0627 \u062a\u0633\u0644\u0637 \u0628\u0631 \u0627\u06cc\u0646 20 \u062a\u06a9\u0646\u06cc\u06a9 \u060c \u062f\u0631 \u0631\u0627\u0647 \u0633\u0627\u062e\u062a\u0646 \u0628\u0631\u0646\u0627\u0645\u0647 \u0647\u0627\u06cc \u0648\u0628 \u0642\u0648\u06cc \u0648 \u06a9\u0627\u0631\u0622\u0645\u062f \u0628\u0647 \u062e\u0648\u0628\u06cc \u062e\u0648\u0627\u0647\u06cc\u062f \u0628\u0648\u062f. \u0633\u0641\u0631 \u06cc\u0627\u062f\u06af\u06cc\u0631\u06cc \u0631\u0627 \u062f\u0631 \u0622\u063a\u0648\u0634 \u0628\u06af\u06cc\u0631\u06cc\u062f \u060c \u0628\u0627 \u0627\u06cc\u062f\u0647 \u0647\u0627\u06cc \u062c\u062f\u06cc\u062f \u0622\u0632\u0645\u0627\u06cc\u0634 \u06a9\u0646\u06cc\u062f \u0648 \u0627\u0632 \u0647\u0645\u0647 \u0645\u0647\u0645\u062a\u0631 \u060c \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0633\u0631\u06af\u0631\u0645 \u06a9\u0646\u0646\u062f\u0647 \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u062f!<\/p>\n<p>\u0627\u06af\u0631 \u0627\u06cc\u0646 \u0631\u0627\u0647\u0646\u0645\u0627 \u0631\u0627 \u0645\u0641\u06cc\u062f \u062f\u0627\u0646\u0633\u062a\u06cc\u062f \u060c \u062f\u0648\u0633\u062a \u062f\u0627\u0631\u0645 \u0634\u0645\u0627 \u0631\u0627 \u062f\u0631 GitHub \u062f\u0631 Sovannaro \u0628\u0631\u0627\u06cc \u0646\u06a9\u0627\u062a \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u060c \u067e\u0631\u0648\u0698\u0647 \u0647\u0627 \u0648 \u0628\u0647 \u0631\u0648\u0632\u0631\u0633\u0627\u0646\u06cc \u0647\u0627\u06cc \u0628\u06cc\u0634\u062a\u0631 \u062f\u0646\u0628\u0627\u0644 \u06a9\u0646\u06cc\u062f. \u0628\u06cc\u0627\u06cc\u06cc\u062f \u062f\u0631 \u062c\u0627\u0645\u0639\u0647 React \u0628\u0627 \u0647\u0645 \u0627\u0631\u062a\u0628\u0627\u0637 \u0628\u0631\u0642\u0631\u0627\u0631 \u06a9\u0646\u06cc\u0645 \u0648 \u0631\u0634\u062f \u06a9\u0646\u06cc\u0645!<\/p>\n<p>\u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0645\u0628\u0627\u0631\u06a9! \ud83c\udf89\ud83d\udcbb<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0628\u0647 \u062f\u0646\u06cc\u0627\u06cc \u0647\u06cc\u062c\u0627\u0646 \u0627\u0646\u06af\u06cc\u0632 React.js \u062e\u0648\u0634 \u0622\u0645\u062f\u06cc\u062f! \u0627\u06cc\u0646 \u06a9\u0647 \u0622\u06cc\u0627 \u0634\u0645\u0627 \u062a\u0627\u0632\u0647 \u0634\u0631\u0648\u0639 \u0628\u0647 \u06a9\u0627\u0631 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u062f \u06cc\u0627 \u0628\u0647 \u062f\u0646\u0628\u0627\u0644 \u062a\u0639\u0645\u06cc\u0642 \u062f\u0631\u06a9 \u062e\u0648\u062f \u0647\u0633\u062a\u06cc\u062f \u060c \u062a\u0633\u0644\u0637 \u0628\u0631 \u0627\u06cc\u0646 20 \u062a\u06a9\u0646\u06cc\u06a9 \u0634\u0645\u0627 \u0631\u0627 \u062f\u0631 \u0645\u0633\u06cc\u0631\u06cc \u0642\u0631\u0627\u0631 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0628\u0647 \u06cc\u06a9 \u062a\u0648\u0633\u0639\u0647 \u062f\u0647\u0646\u062f\u0647 React 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