{"id":103540,"date":"2022-03-15T03:37:00","date_gmt":"2022-03-15T01:37:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yazyk-javascript-predlozheno-dobavit-sintaksis-s-informacziej-o-tipah"},"modified":"2022-03-15T03:37:00","modified_gmt":"2022-03-15T01:37:01","slug":"v-yazyk-javascript-predlozheno-dobavit-sintaksis-s-informacziej-o-tipah","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/v-yazyk-javascript-predlozheno-dobavit-sintaksis-s-informacziej-o-tipah","title":{"rendered":"Proponuje si\u0119 dodanie sk\u0142adni z informacjami o typach do j\u0119zyka JavaScript","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Firmy Microsoft, Igalia oraz Bloomberg zaproponowa\u0142y dodanie do specyfikacji JavaScript sk\u0142adni dla jawnego okre\u015blania typ\u00f3w, podobnej do tej stosowanej w j\u0119zyku TypeScript. Obecnie prototyp zmian, zaproponowany do w\u0142\u0105czenia do standardu ECMAScript, zosta\u0142 przed\u0142o\u017cony do wst\u0119pnych dyskusji (Etap 0). Na najbli\u017cszym marcowym posiedzeniu komitetu TC39 planuje si\u0119 przej\u015bcie do pierwszej fazy rozpatrywania propozycji z udzia\u0142em spo\u0142eczno\u015bci ekspert\u00f3w z ECMA. <\/p>\n

Wyra\u017ane okre\u015blenie typ\u00f3w pozwoli unikn\u0105\u0107 wielu b\u0142\u0119d\u00f3w w trakcie rozwijania oprogramowania, umo\u017cliwi wykorzystanie dodatkowych technik optymalizacji, upro\u015bci debugowanie oraz uczyni kod bardziej czytelnym i \u0142atwiejszym do modyfikacji oraz utrzymania przez innych programist\u00f3w. Wsparcie dla typ\u00f3w proponuje si\u0119 wprowadzi\u0107 jako opcjonaln\u0105 funkcj\u0119 \u2014 silniki JavaScript i \u015brodowiska wykonawcze, kt\u00f3re nie obs\u0142uguj\u0105 weryfikacji typ\u00f3w, b\u0119d\u0105 ignorowa\u0107 adnotacje z informacjami o typach i przetwarza\u0107 kod tak jak wcze\u015bniej, traktuj\u0105c informacje o typach jako komentarze. Narz\u0119dzia do weryfikacji typ\u00f3w b\u0119d\u0105 mog\u0142y na podstawie dost\u0119pnych informacji wykrywa\u0107 b\u0142\u0119dy zwi\u0105zane z niew\u0142a\u015bciwym u\u017cyciem typ\u00f3w. <\/p>\n

W odr\u00f3\u017cnieniu od informacji o typach, definiowanych za pomoc\u0105 adnotacji JSDoc w postaci komentarzy, bezpo\u015brednie okre\u015blenie typ\u00f3w w definicjach zmiennych uczyni kod bardziej przejrzystym, zrozumia\u0142ym i \u0142atwiejszym do edytowania. Na przyk\u0142ad zintegrowane \u015brodowiska programistyczne wspieraj\u0105ce TypeScript b\u0119d\u0105 mog\u0142y od razu pod\u015bwietla\u0107 b\u0142\u0119dy w kodzie JavaScript z typami bez dodatkowych przekszta\u0142ce\u0144. Co wi\u0119cej, wbudowane wsparcie typ\u00f3w umo\u017cliwi uruchamianie program\u00f3w napisanych w typowanych dialektach JavaScript, takich jak TypeScript i Flow, bez transpilacji mi\u0119dzy jednym j\u0119zykiem a drugim.

\"Proponuje<\/center> <\/p>\n

\u0418\u0437 \u0442\u0438\u043f\u043e\u0432 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c «string», «number» \u0438 «boolean», \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0436\u043d\u043e \u0431\u0443\u0434\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u0438 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0438 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445, \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0439, \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u043e\u0432 \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u0432, \u043f\u043e\u043b\u0435\u0439 \u043a\u043b\u0430\u0441\u0441\u043e\u0432, \u0442\u0438\u043f\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043c\u0430\u0441\u0441\u0438\u0432\u043e\u0432 («number[]»). \u041f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0442\u0430\u043a\u0436\u0435 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u0451\u043d\u043d\u044b\u0445 \u0442\u0438\u043f\u043e\u0432 («string | number») \u0438 \u0434\u0436\u0435\u043d\u0435\u0440\u0438\u043a\u043e\u0432. let x: string; function add(a: number, b: number) { return a + b; } interface Person { name: string; age: number; } function foo<T>(x: T) { return x; } function foo(x: string | number): string | number { if (typeof x === number) { return x + 1 } else { return x + «!» } }
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Microsoft, Igalia \u0438 Bloomberg \u0432\u044b\u0441\u0442\u0443\u043f\u0438\u043b\u0438 \u0441 \u0438\u043d\u0438\u0446\u0438\u0430\u0442\u0438\u0432\u043e\u0439 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e JavaScript \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441\u0430 \u0434\u043b\u044f \u044f\u0432\u043d\u043e\u0433\u043e \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0442\u0438\u043f\u043e\u0432, \u043f\u043e\u0445\u043e\u0436\u0435\u0433\u043e \u043d\u0430 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0439 \u0432 \u044f\u0437\u044b\u043a\u0435 TypeScript. \u0412 \u043d\u0430\u0441\u0442\u043e\u044f\u0449\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u043f\u0440\u043e\u0442\u043e\u0442\u0438\u043f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 ECMAScript, \u0432\u044b\u043d\u0435\u0441\u0435\u043d \u0434\u043b\u044f \u043f\u0440\u0435\u0434\u0432\u0430\u0440\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0439 (Stage 0). \u041d\u0430 \u0431\u043b\u0438\u0436\u0430\u0439\u0448\u0435\u043c \u043c\u0430\u0440\u0442\u043e\u0432\u0441\u043a\u043e\u043c \u0437\u0430\u0441\u0435\u0434\u0430\u043d\u0438\u0438 \u043a\u043e\u043c\u0438\u0442\u0435\u0442\u0430 TC39 \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043f\u0435\u0440\u0435\u0439\u0442\u0438 \u043d\u0430 \u043f\u0435\u0440\u0432\u0443\u044e \u0441\u0442\u0430\u0434\u0438\u044e \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043d\u0438\u044f \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0441 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":103541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-103540","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Proponuje si\u0119 doda\u0107 do j\u0119zyka JavaScript sk\u0142adni\u0119 z informacj\u0105 o typach | ProHoster","description":"Firmy Microsoft, Igalia oraz Bloomberg zaproponowa\u0142y dodanie do specyfikacji JavaScript sk\u0142adni dla jawnego 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