{"id":72095,"date":"2024-08-04T02:41:11","date_gmt":"2024-08-03T23:11:11","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/pildoras-typescript-type-narrowing-con-as-const-g5\/"},"modified":"2024-08-04T02:41:11","modified_gmt":"2024-08-03T23:11:11","slug":"pildoras-typescript-type-narrowing-con-as-const-g5","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/pildoras-typescript-type-narrowing-con-as-const-g5\/","title":{"rendered":"P\u00edldoras TypeScript: \u062a\u0627\u06cc\u067e \u0628\u0627\u0631\u06cc\u06a9 \u06a9\u0631\u062f\u0646 con “as const”"},"content":{"rendered":"
\n

\u062f\u0631 \u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u0645\u0648\u0627\u0642\u0639 \u0647\u0646\u06af\u0627\u0645 \u062a\u062e\u0635\u06cc\u0635 \u06cc\u06a9 \u0645\u0642\u062f\u0627\u0631 \u0633\u0627\u0632\u06af\u0627\u0631 \u0628\u0627 \u0646\u0648\u0639 \u0645\u0648\u0631\u062f \u0627\u0646\u062a\u0638\u0627\u0631 \u0628\u0647 \u06cc\u06a9 \u0645\u062a\u063a\u06cc\u0631\u060c \u0628\u0627 \u062e\u0637\u0627\u06cc\u06cc \u0645\u0627\u0646\u0646\u062f “\u0631\u0634\u062a\u0647 \u0642\u0627\u0628\u0644 \u0627\u0646\u062a\u0633\u0627\u0628 \u0628\u0647… \u0647\u0631 \u0686\u0647 \u0628\u0627\u0634\u062f” \u0645\u0648\u0627\u062c\u0647 \u0634\u062f\u0647 \u0627\u06cc\u062f. \u0627\u06cc\u0646 \u0632\u0645\u0627\u0646\u06cc \u0627\u062a\u0641\u0627\u0642 \u0645\u06cc\u200c\u0627\u0641\u062a\u062f \u06a9\u0647 TypeScript \u06cc\u06a9 \u0646\u0648\u0639 \u06af\u0633\u062a\u0631\u062f\u0647\u200c\u062a\u0631 \u0627\u0632 \u062d\u062f \u0627\u0646\u062a\u0638\u0627\u0631 \u0631\u0627 \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc\u200c\u06a9\u0646\u062f<\/strong> \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u0645\u062a\u063a\u06cc\u0631\u060c \u0645\u0627\u0646\u0646\u062f \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u06cc\u06a9 \u0631\u0634\u062a\u0647 \u0631\u0627 \u0628\u0647 \u0645\u062a\u063a\u06cc\u0631\u06cc \u06a9\u0647 \u0628\u0627\u06cc\u062f \u0627\u0632 \u0646\u0648\u0639 \u062a\u062d\u062a \u0627\u0644\u0644\u0641\u0638\u06cc \u0628\u0627\u0634\u062f \u0627\u062e\u062a\u0635\u0627\u0635 \u0645\u06cc \u062f\u0647\u06cc\u0645.<\/p>\n

\u0628\u0631\u0627\u06cc \u062f\u0631\u06a9 \u0628\u0647\u062a\u0631\u060c \u0627\u062c\u0627\u0632\u0647 \u062f\u0647\u06cc\u062f \u0628\u0627 \u06cc\u06a9 \u0645\u062b\u0627\u0644 \u0628\u0647 \u0622\u0646 \u0646\u06af\u0627\u0647 \u06a9\u0646\u06cc\u0645. <\/p>\n

\u0645\u0627 \u06cc\u06a9 \u0646\u0648\u0639 \u062f\u0627\u0631\u06cc\u0645 Severity<\/code> \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u0627\u062a\u062d\u0627\u062f \u0631\u0634\u062a\u0647 \u0627\u06cc \u0627\u0632 \u0645\u0642\u0627\u062f\u06cc\u0631: “\u06a9\u0645”\u060c “\u0645\u062a\u0648\u0633\u0637” \u0648 “\u0628\u0627\u0644\u0627” \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n

\n
type<\/span> Severity<\/span> =<\/span> \"<\/span>low<\/span>\"<\/span> |<\/span> \"<\/span>medium<\/span>\"<\/span> |<\/span> \"<\/span>high<\/span>\"<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0645\u06cc \u062a\u0648\u0627\u0646\u0633\u062a\u06cc\u0645 \u0628\u06af\u0648\u06cc\u06cc\u0645 Severity<\/code> \u06cc\u06a9 \u0632\u06cc\u0631\u06af\u0631\u0648\u0647 \u0627\u0632 string<\/code> \u06a9\u0647 \u0627\u0632 \u0628\u06cc\u0646 \u062a\u0645\u0627\u0645 \u0631\u0634\u062a\u0647 \u0647\u0627\u06cc \u0645\u0645\u06a9\u0646\u060c \u0641\u0642\u0637 \u0622\u0646 \u0633\u0647 \u0631\u0627 \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n
\u0627\u0632 \u0637\u0631\u0641 \u062f\u06cc\u06af\u0631 \u0645\u0627 \u06cc\u06a9 \u0634\u06cc \u062f\u0627\u0631\u06cc\u0645 messages<\/code> \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u06a9\u0644\u06cc\u062f\u0647\u0627 a Severity<\/code> \u0648 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0631\u0634\u062a\u0647 \u0647\u0627 \u0647\u0633\u062a\u0646\u062f.<\/p>\n
\n
const<\/span> messages<\/span>:<\/span> Record<\/span>Severity<\/span>,<\/span> string<\/span>><\/span> =<\/span> {<\/span>\n  low<\/span>:<\/span> \"<\/span>\ud83d\ude15 not good<\/span>\"<\/span>,<\/span>\n  medium<\/span>:<\/span> \"<\/span>\ud83d\ude16 ugly<\/span>\"<\/span>,<\/span>\n  high<\/span>:<\/span> \"<\/span>\ud83d\ude31 AAAAHHH!!!<\/span>\"<\/span>,<\/span>\n}<\/span>\n<\/span><\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0645\u0627 \u0645\u06cc \u062e\u0648\u0627\u0647\u06cc\u0645 \u0628\u0647 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0622\u0646 \u062f\u0633\u062a\u0631\u0633\u06cc \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u0645 messages<\/code> \u0648 \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u06cc\u06a9 \u0645\u062a\u063a\u06cc\u0631 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u06a9\u0646\u06cc\u0645 severity<\/code> \u0628\u0627 \u0645\u0642\u062f\u0627\u0631 “\u06a9\u0645”.<\/p>\n
\n
let<\/span> severity<\/span> =<\/span> \"<\/span>low<\/span>\"<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>messages<\/span>[<\/span>severity<\/span>])<\/span>\n\/\/          ^? Error: Element implicitly has an 'any' type because<\/span>\n\/\/ expression of type 'string' can't be used to index type <\/span>\n\/\/ 'Record'.<\/severity><\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0627\u06af\u0631\u0686\u0647 \u0645\u0642\u062f\u0627\u0631\u06cc \u06a9\u0647 \u0628\u0647 \u0645\u062a\u063a\u06cc\u0631 \u0646\u0633\u0628\u062a \u062f\u0627\u062f\u0647 \u0627\u06cc\u0645 severity<\/code> \u0628\u0627 \u0646\u0648\u0639 \u0622\u0646 \u0633\u0627\u0632\u06af\u0627\u0631 \u0627\u0633\u062a Severity<\/code>\u060c TypeScript \u062e\u0637\u0627\u06cc\u06cc \u0631\u0627 \u0628\u0647 \u0645\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u0628\u0647 \u0645\u0627 \u0645\u06cc \u06af\u0648\u06cc\u062f \u06a9\u0647 \u06a9\u0644\u06cc\u062f\u0647\u0627 messages<\/code> \u0628\u0627\u06cc\u062f \u0627\u0632 \u0646\u0648\u0639 \u0628\u0627\u0634\u062f Severity<\/code> \u0648 \u0646\u0647 \u0627\u0632 \u0646\u0648\u0639 string<\/code>.<\/p>\n
\u0628\u0631\u0627\u06cc \u062f\u0631\u06a9 \u0627\u06cc\u0646\u06a9\u0647 \u0686\u0631\u0627 \u0627\u06cc\u0646 \u0627\u062a\u0641\u0627\u0642 \u0645\u06cc \u0627\u0641\u062a\u062f\u060c \u0645\u0627 \u0628\u0627\u06cc\u062f \u0628\u0641\u0647\u0645\u06cc\u0645 \u06a9\u0647 TypeScript \u0686\u06af\u0648\u0646\u0647 \u0627\u0646\u0648\u0627\u0639 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc\u06cc \u0631\u0627 \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc\u200c\u06a9\u0646\u062f \u06a9\u0647 \u0645\u0627 \u0628\u0647 \u0637\u0648\u0631 \u0635\u0631\u06cc\u062d \u0628\u0647 \u0622\u0646\u0647\u0627 \u0646\u0648\u0639 \u0627\u062e\u062a\u0635\u0627\u0635 \u0646\u0645\u06cc\u200c\u062f\u0647\u06cc\u0645.<\/strong>.<\/p>\n
\u0627\u06af\u0631 \u062f\u0631 \u0648\u06cc\u0631\u0627\u06cc\u0634\u06af\u0631 \u062e\u0648\u062f \u06cc\u0627 \u062f\u0631 \u062a\u0627\u06cc\u067e \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a Playground \u0631\u0648\u06cc \u0634\u0646\u0627\u0648\u0631 \u0646\u06af\u0647 \u062f\u0627\u0631\u06cc\u062f severity<\/code> \u062e\u0648\u0627\u0647\u06cc\u0645 \u062f\u06cc\u062f \u06a9\u0647 TypeScript \u0622\u0646 \u0631\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc \u06a9\u0646\u062f string<\/code>.<\/p>\n
\u0627\u06cc\u0646 \u0628\u0647 \u0627\u06cc\u0646 \u062f\u0644\u06cc\u0644 \u0627\u0633\u062a \u06a9\u0647 \u0645\u0627 \u0627\u0639\u0644\u0627\u0645 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 severity<\/code> \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0643\u0631\u062f\u0646 let<\/code> \u0648 \u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0645\u0642\u062f\u0627\u0631\u06cc \u0631\u0627 \u06a9\u0647 \u0628\u0627 \u0622\u0646 \u0633\u0627\u0632\u06af\u0627\u0631 \u0646\u06cc\u0633\u062a \u062f\u0648\u0628\u0627\u0631\u0647 \u0628\u0647 \u0622\u0646 \u0627\u062e\u062a\u0635\u0627\u0635 \u062f\u0647\u06cc\u0645 Severity<\/code> \u0647\u0631 \u0632\u0645\u0627\u0646 \u06a9\u0647.<\/p>\n
<\/p>\n
\u062f\u0631 \u0627\u06cc\u0646 \u0645\u0648\u0627\u0631\u062f\u060c TypeScript \u0686\u06cc\u0632\u06cc \u0631\u0627 \u0627\u0639\u0645\u0627\u0644 \u0645\u06cc \u06a9\u0646\u062f \u06a9\u0647 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 ” \u0634\u0646\u0627\u062e\u062a\u0647 \u0645\u06cc \u0634\u0648\u062f\u06af\u0633\u062a\u0631\u062f\u0647 \u0634\u062f\u0646<\/em>“\u0648 \u0648\u0633\u06cc\u0639 \u062a\u0631\u06cc\u0646 \u0646\u0648\u0639 \u0631\u0627 \u0628\u0647 \u0645\u062a\u063a\u06cc\u0631 \u0627\u062e\u062a\u0635\u0627\u0635 \u0645\u06cc \u062f\u0647\u062f<\/strong> \u06a9\u0647 \u0628\u0627 \u0645\u0642\u062f\u0627\u0631\u06cc \u06a9\u0647 \u062f\u0631 \u0627\u0628\u062a\u062f\u0627 \u0628\u0647 \u0622\u0646 \u0627\u062e\u062a\u0635\u0627\u0635 \u062f\u0627\u062f\u0647 \u0627\u06cc\u0645 \u0633\u0627\u0632\u06af\u0627\u0631 \u0627\u0633\u062a. <\/p>\n
\u0645\u0631\u0627\u0642\u0628 \u0628\u0627\u0634\u06cc\u062f\u060c \u0645\u0646 \u0645\u06cc \u06af\u0648\u06cc\u0645 “\u062f\u0631 \u0627\u0628\u062a\u062f\u0627” \u0632\u06cc\u0631\u0627 TypeScript \u0627\u0632 \u0645\u0627 \u0627\u0646\u062a\u0638\u0627\u0631 \u062f\u0627\u0631\u062f \u06a9\u0647 \u0645\u0642\u062f\u0627\u0631 \u06cc\u06a9 \u0645\u062a\u063a\u06cc\u0631 \u0631\u0627 \u062f\u0631 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627<\/em>\u060c \u0627\u0645\u0627 \u0646\u0647 \u0646\u0648\u0639 \u0622\u0646 (\u0627\u0632 string<\/code> \u0622 number<\/code>\u060c \u0648 \u063a\u06cc\u0631\u0647.).  \u0627\u06af\u0631 \u0642\u0635\u062f \u0645\u0627 \u0627\u06cc\u0646 \u0627\u0633\u062a\u060c \u0628\u0627\u06cc\u062f \u0628\u0647 \u0635\u0631\u0627\u062d\u062a \u0622\u0646 \u0631\u0627 \u0645\u0634\u062e\u0635 \u06a9\u0646\u06cc\u0645.<\/p>\n
\u0627\u06af\u0631 \u0645\u062a\u063a\u06cc\u0631 \u0631\u0627 \u0628\u0627 \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0646\u06cc\u0645\u060c \u0647\u0645\u06cc\u0646 \u0627\u062a\u0641\u0627\u0642 \u0646\u0645\u06cc \u0627\u0641\u062a\u062f const<\/code>.<\/p>\n
\n
const<\/span> severity<\/span> =<\/span> \"<\/span>low<\/span>\"<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>messages<\/span>[<\/span>severity<\/span>])<\/span> \/\/ OK<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0627\u0632 \u0622\u0646\u062c\u0627\u06cc\u06cc \u06a9\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 const<\/code> \u0627\u062c\u0627\u0632\u0647 \u062a\u062e\u0635\u06cc\u0635 \u0645\u062c\u062f\u062f \u0645\u062a\u063a\u06cc\u0631 \u0631\u0627 \u0646\u0645\u06cc \u062f\u0647\u062f\u060c TypeScript \u0646\u0648\u0639 \u062a\u062d\u062a \u0627\u0644\u0644\u0641\u0638\u06cc “low” \u0631\u0627 \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc \u06a9\u0646\u062f \u0648 \u062e\u0637\u0627 \u0646\u0627\u067e\u062f\u06cc\u062f \u0645\u06cc \u0634\u0648\u062f.<\/p>\n
\"\u0646\u0648\u0639<\/p>\n
\u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646\u060c \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u0642\u0627\u0639\u062f\u0647 \u06a9\u0644\u06cc (\u0628\u0647 \u0627\u0633\u062a\u062b\u0646\u0627\u06cc \u0628\u0631\u062e\u06cc \u0645\u0648\u0627\u0631\u062f) TypeScript \u0648\u0633\u06cc\u0639 \u062a\u0631\u06cc\u0646 \u0646\u0648\u0639 \u0631\u0627 \u0628\u0631\u0627\u06cc \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0646\u0648\u0639 \u0627\u0648\u0644\u06cc\u0647 \u0627\u0639\u0644\u0627\u0645 \u0634\u062f\u0647 \u0628\u0627 \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc \u06a9\u0646\u062f let<\/code> \u0648 \u0646\u0648\u0639 \u062a\u062d\u062a \u0627\u0644\u0644\u0641\u0638\u06cc \u0628\u0631\u0627\u06cc \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0627\u0639\u0644\u0627\u0645 \u0634\u062f\u0647 \u0628\u0627 const<\/code><\/strong>.<\/p>\n
\u0628\u0631\u0627\u06cc \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0646\u0648\u0639 \u0627\u0628\u062a\u062f\u0627\u06cc\u06cc \u0628\u0633\u06cc\u0627\u0631 \u0632\u06cc\u0627\u062f \u0627\u0633\u062a\u060c \u0627\u0645\u0627 \u0686\u0647 \u0627\u062a\u0641\u0627\u0642\u06cc \u0628\u0631\u0627\u06cc \u0627\u0634\u06cc\u0627 \u0645\u06cc \u0627\u0641\u062a\u062f\u061f<\/strong><\/p>\n
\u0628\u06cc\u0627\u06cc\u06cc\u062f \u0622\u0646 \u0631\u0627 \u0628\u0627 \u06cc\u06a9 \u0645\u062b\u0627\u0644 \u062f\u06cc\u06af\u0631 \u0628\u0628\u06cc\u0646\u06cc\u0645.<\/p>\n
\u0645\u0627 \u06cc\u06a9 \u0631\u0627\u0628\u0637 \u062f\u0627\u0631\u06cc\u0645 Issue<\/code> \u0628\u0627 \u0627\u06cc\u0646 \u062e\u0648\u0627\u0635:<\/p>\n
\n
interface<\/span> Issue<\/span> {<\/span>\n  id<\/span>:<\/span> string<\/span>\n  severity<\/span>:<\/span> Severity<\/span>\n}<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0648 \u06cc\u06a9 \u062a\u0627\u0628\u0639 printIssue<\/code> \u06a9\u0647 \u06cc\u06a9 \u0634\u06cc \u0627\u0632 \u0646\u0648\u0639 \u0631\u0627 \u062f\u0631\u06cc\u0627\u0641\u062a \u0645\u06cc \u06a9\u0646\u062f Issue<\/code> \u0648 \u06a9\u0627\u0631\u06cc \u0628\u0627 \u0622\u0646 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u062f\u060c \u06a9\u0647 \u0628\u0631\u0627\u06cc \u0645\u0627 \u0645\u0647\u0645 \u0646\u06cc\u0633\u062a.<\/p>\n
\n
declare<\/span> function<\/span> printIssue<\/span>(<\/span>issue<\/span>:<\/span> Issue<\/span>):<\/span> void<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0627\u06af\u0631 \u0628\u0631\u06cc\u0645 \u0628\u0647 printIssue<\/code> \u06cc\u06a9 \u0634\u06cc \u0628\u0627 \u0633\u0627\u062e\u062a\u0627\u0631\u06cc \u0633\u0627\u0632\u06af\u0627\u0631 \u0628\u0627 Issue<\/code>\u060c TypeScript \u062e\u0637\u0627\u06cc\u06cc \u0631\u0627 \u0628\u0647 \u0645\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u0627\u0646\u0648\u0627\u0639 severity<\/code> \u0628\u0627 \u0647\u0645 \u0633\u0627\u0632\u06af\u0627\u0631 \u0646\u06cc\u0633\u062a\u0646\u062f.<\/p>\n
\n
const<\/span> issue<\/span> =<\/span> {<\/span>\n  id<\/span>:<\/span> '<\/span>123<\/span>'<\/span>,<\/span>\n  severity<\/span>:<\/span> '<\/span>low<\/span>'<\/span>,<\/span>\n}<\/span>\n\nprintIssue<\/span>(<\/span>issue<\/span>)<\/span>\n\/\/         ^? Error: Argument of type '{ id: string; severity:<\/span>\n\/\/ string; }' is not assignable to parameter of type 'Issue'. <\/span>\n\/\/ Types of property 'severity' are incompatible.          <\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u062f\u0631 \u0645\u0648\u0631\u062f \u0627\u0634\u06cc\u0627 \u0635\u0631\u0641 \u0646\u0638\u0631 \u0627\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u0622\u0646\u0647\u0627 \u0631\u0627 \u0628\u0627 \u0627\u0639\u0644\u0627\u0645 \u06a9\u0646\u06cc\u0645 let<\/code> o const<\/code>\u060c TypeScript \u0646\u0648\u0639 \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u062e\u0648\u062f \u0631\u0627 \u0628\u0647 \u06af\u0648\u0646\u0647 \u0627\u06cc \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc \u06a9\u0646\u062f \u06a9\u0647 \u06af\u0648\u06cc\u06cc \u0628\u0627 \u0622\u0646\u0647\u0627 \u0627\u0639\u0644\u0627\u0645 \u0634\u062f\u0647 \u0627\u0646\u062f let<\/code><\/strong>.<\/p>\n
\u0627\u06af\u0631\u0686\u0647 \u0645\u0627 \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0645\u0642\u062f\u0627\u0631 \u062c\u062f\u06cc\u062f\u06cc \u0631\u0627 \u0628\u0647 \u0645\u062a\u063a\u06cc\u0631\u06cc \u0627\u0632 \u0646\u0648\u0639 \u0634\u06cc \u06a9\u0647 \u0628\u0627 \u0622\u0646 \u0627\u0639\u0644\u0627\u0645 \u0634\u062f\u0647 \u0627\u0633\u062a \u0627\u062e\u062a\u0635\u0627\u0635 \u062f\u0647\u06cc\u0645 const<\/code>\u060c \u0628\u0644\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u0622\u0646 \u0631\u0627 \u062a\u063a\u06cc\u06cc\u0631 \u062f\u0647\u06cc\u0645.<\/p>\n
\n
issue<\/span>.<\/span>severity<\/span> =<\/span> '<\/span>other<\/span>'<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0627\u06af\u0631 \u0645\u062f\u062a\u06cc \u0627\u0633\u062a \u06a9\u0647 \u0628\u0627 TypeScript \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u06cc\u0645\u060c \u0645\u06cc \u062f\u0627\u0646\u06cc\u0645 \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u06cc\u0646 \u0645\u0634\u06a9\u0644 \u0631\u0627 \u0627\u0632 \u0686\u0646\u062f \u0631\u0627\u0647 \u062d\u0644 \u06a9\u0646\u06cc\u0645 \u0648 \u06cc\u06a9\u06cc \u0627\u0632 \u0622\u0646\u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 as const<\/code> \u062f\u0631 \u0627\u0645\u0648\u0627\u0644 \u0646\u0627\u0633\u0627\u0632\u06af\u0627\u0631<\/p>\n
\n
const<\/span> issue<\/span> =<\/span> {<\/span>\n  id<\/span>:<\/span> '<\/span>123<\/span>'<\/span>,<\/span>\n  severity<\/span>:<\/span> '<\/span>low<\/span>'<\/span> as<\/span> const<\/span>,<\/span>\n}<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 as const<\/code> \u0645\u0627 \u0628\u0647 TypeScript \u0645\u06cc \u06af\u0648\u06cc\u06cc\u0645 \u06a9\u0647 \u06a9\u0648\u0686\u06a9\u062a\u0631\u06cc\u0646 \u0646\u0648\u0639 \u0645\u0645\u06a9\u0646 \u0631\u0627 \u0627\u0633\u062a\u0646\u062a\u0627\u062c \u06a9\u0646\u062f (\u0628\u0627\u0631\u06cc\u06a9 \u0634\u062f\u0646<\/em>) \u0628\u0631\u0627\u06cc \u0645\u0644\u06a9 severity<\/code> \u0628\u0647 \u062c\u0627\u06cc \u0646\u0648\u0639 \u06af\u0633\u062a\u0631\u062f\u0647 \u062a\u0631 string<\/code>.  \u062f\u0631 \u0627\u06cc\u0646 \u0635\u0648\u0631\u062a \u0646\u0648\u0639 \u062a\u062d\u062a \u0627\u0644\u0644\u0641\u0638\u06cc \u00ab\u06a9\u0645\u00bb \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n
\"\u0627\u0633\u062a\u0641\u0627\u062f\u0647<\/p>\n
\u06cc\u06a9\u06cc \u062f\u06cc\u06af\u0631 \u0627\u0632 \u0631\u0627\u0647 \u0647\u0627\u06cc \u062d\u0644 \u0627\u06cc\u0646 \u0645\u0634\u06a9\u0644\u060c \u0628\u0631\u0627\u06cc \u0627\u0647\u062f\u0627\u0641 \u0622\u0645\u0648\u0632\u0634\u06cc\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0633\u062a Object.freeze<\/code> \u062f\u0631 \u0645\u0648\u0631\u062f \u0634\u06cc<\/p>\n
\n
const<\/span> issue<\/span> =<\/span> Object<\/span>.<\/span>freeze<\/span>({<\/span>\n  id<\/span>:<\/span> '<\/span>123<\/span>'<\/span>,<\/span>\n  severity<\/span>:<\/span> '<\/span>low<\/span>'<\/span>,<\/span>\n})<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0628\u0627 \u062a\u0648\u062c\u0647 \u0628\u0647 Object.freeze<\/code> \u06cc\u06a9 \u0634\u06cc \u0641\u0642\u0637 \u062e\u0648\u0627\u0646\u062f\u0646\u06cc \u0631\u0627 \u0628\u0631\u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u062f\u060c TypeScript \u0646\u0648\u0639 \u062a\u062d\u062a \u0627\u0644\u0644\u0641\u0638\u06cc \u0631\u0627 \u0628\u0631\u0627\u06cc \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u0622\u0646 \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n
\"\u0627\u0633\u062a\u0641\u0627\u062f\u0647<\/p>\n
Object.freeze<\/code>  \u06cc\u06a9 \u0648\u06cc\u0698\u06af\u06cc \u062f\u0627\u0631\u062f \u06a9\u0647 \u062f\u0631 \u0628\u0631\u062e\u06cc \u0645\u0648\u0627\u0631\u062f \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u06cc\u06a9 \u0627\u06cc\u0631\u0627\u062f \u0628\u0627\u0634\u062f \u0648 \u0622\u0646 \u0627\u06cc\u0646 \u0627\u0633\u062a \u06a9\u0647 \u062a\u063a\u06cc\u06cc\u0631 \u0646\u0627\u067e\u0630\u06cc\u0631\u06cc \u0622\u0646 \u0627\u06cc\u0646 \u0627\u0633\u062a \u06a9\u0647 “\u06a9\u0645 \u0639\u0645\u0642<\/em>“\u060c \u06cc\u0639\u0646\u06cc \u0641\u0642\u0637 \u0631\u0648\u06cc \u062e\u0635\u0648\u0635\u06cc\u0627\u062a \u0634\u06cc \u062a\u0627\u062b\u06cc\u0631 \u0645\u06cc \u06af\u0630\u0627\u0631\u062f\u060c \u0627\u0645\u0627 \u0631\u0648\u06cc \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u062a\u0648\u062f\u0631\u062a\u0648 \u0622\u0646 \u062a\u0627\u062b\u06cc\u0631 \u0646\u0645\u06cc \u06af\u0630\u0627\u0631\u062f\u060c \u06a9\u0647 \u0647\u0646\u0648\u0632 \u0647\u0645 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0622\u0646\u0647\u0627 \u0631\u0627 \u062a\u063a\u06cc\u06cc\u0631 \u062f\u0627\u062f.<\/p>\n
\u0627\u06af\u0631 \u0645\u0627 \u0639\u0644\u0627\u0642\u0647 \u0645\u0646\u062f \u0628\u0647 \u0639\u0644\u0627\u0645\u062a \u06af\u0630\u0627\u0631\u06cc \u06cc\u06a9 \u0634\u06cc \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0647\u0633\u062a\u06cc\u0645 readonly<\/code> \u062f\u0631 \u0639\u0645\u0642\u060c \u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u0639\u0645\u0627\u0644 \u06a9\u0646\u06cc\u0645 as const<\/code> \u0628\u0647 \u06a9\u0644 \u0634\u06cc<\/p>\n
\n
const<\/span> issue<\/span> =<\/span> {<\/span>\n  id<\/span>:<\/span> '<\/span>123<\/span>'<\/span>,<\/span>\n  severity<\/span>:<\/span> '<\/span>low<\/span>'<\/span>,<\/span>\n  another<\/span>:<\/span> {<\/span>\n    prop<\/span>:<\/span> '<\/span>value<\/span>'<\/span>\n  }<\/span>\n}<\/span> as<\/span> const<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
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\u0627\u06af\u0631 \u062a\u0627 \u0627\u06cc\u0646\u062c\u0627 \u067e\u06cc\u0634 \u0631\u0641\u062a\u06cc\u062f\u060c \u0645\u0645\u0646\u0648\u0646\u0645!  \u0648 \u0627\u06af\u0631 \u0634\u0645\u0627 \u0647\u0645 \u0622\u0646 \u0631\u0627 \u0645\u0641\u06cc\u062f \u062f\u06cc\u062f\u06cc\u062f \u06cc\u0627 \u0628\u0647 \u0633\u0627\u062f\u06af\u06cc \u0622\u0646 \u0631\u0627 \u062f\u0648\u0633\u062a \u062f\u0627\u0634\u062a\u06cc\u062f\u060c \u0628\u0627 \u0627\u0634\u062a\u0631\u0627\u06a9 \u06af\u0630\u0627\u0631\u06cc \u0622\u0646 \u0628\u0647 \u0645\u0646 \u06a9\u0645\u06a9 \u06a9\u0646\u06cc\u062f \u062a\u0627 \u0628\u0647 \u0627\u0641\u0631\u0627\u062f \u0628\u06cc\u0634\u062a\u0631\u06cc \u062f\u0633\u062a\u0631\u0633\u06cc \u067e\u06cc\u062f\u0627 \u06a9\u0646\u0645 \ud83d\ude0a<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"
\u062f\u0631 \u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u0645\u0648\u0627\u0642\u0639 \u0647\u0646\u06af\u0627\u0645 \u062a\u062e\u0635\u06cc\u0635 \u06cc\u06a9 \u0645\u0642\u062f\u0627\u0631 \u0633\u0627\u0632\u06af\u0627\u0631 \u0628\u0627 \u0646\u0648\u0639 \u0645\u0648\u0631\u062f \u0627\u0646\u062a\u0638\u0627\u0631 \u0628\u0647 \u06cc\u06a9 \u0645\u062a\u063a\u06cc\u0631\u060c \u0628\u0627 \u062e\u0637\u0627\u06cc\u06cc \u0645\u0627\u0646\u0646\u062f “\u0631\u0634\u062a\u0647 \u0642\u0627\u0628\u0644 \u0627\u0646\u062a\u0633\u0627\u0628 \u0628\u0647… \u0647\u0631 \u0686\u0647 \u0628\u0627\u0634\u062f” \u0645\u0648\u0627\u062c\u0647 \u0634\u062f\u0647 \u0627\u06cc\u062f. \u0627\u06cc\u0646 \u0632\u0645\u0627\u0646\u06cc \u0627\u062a\u0641\u0627\u0642 \u0645\u06cc\u200c\u0627\u0641\u062a\u062f \u06a9\u0647 TypeScript \u06cc\u06a9 \u0646\u0648\u0639 \u06af\u0633\u062a\u0631\u062f\u0647\u200c\u062a\u0631 \u0627\u0632 \u062d\u062f \u0627\u0646\u062a\u0638\u0627\u0631 \u0631\u0627 \u0627\u0633\u062a\u0646\u0628\u0627\u0637 \u0645\u06cc\u200c\u06a9\u0646\u062f \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u0645\u062a\u063a\u06cc\u0631\u060c \u0645\u0627\u0646\u0646\u062f \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u06cc\u06a9 \u0631\u0634\u062a\u0647 \u0631\u0627 \u0628\u0647 \u0645\u062a\u063a\u06cc\u0631\u06cc …<\/p>\n","protected":false},"author":2,"featured_media":72096,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-72095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dev"],"_links":{"self":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/72095","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/comments?post=72095"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/72095\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/72096"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=72095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=72095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=72095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}