Node.js 19.0 er blevet udgivet, en platform til udf\u00f8relse af netv\u00e6rksapplikationer i JavaScript. Node.js 19 tilh\u00f8rer en gren med almindelig support, hvor opdateringer vil blive udgivet indtil juni 2023. I de kommende dage afsluttes stabiliseringen af Node.js 18-grenen, som vil f\u00e5 LTS-status og blive underst\u00f8ttet indtil april 2025. Vedligeholdelsen af den tidligere LTS-version Node.js 16.0 vil forts\u00e6tte indtil september 2023, mens den forudg\u00e5ende LTS-version 14.0 vil vare indtil april 2023. <\/p>\n
Hovedforbedringer: <\/p>\n
Node.js-platformen kan bruges til b\u00e5de server-side drift af webapplikationer og til at skabe almindelige klient- og serverbaserede netv\u00e6rksprogrammer. Der er forberedt en stor samling af moduler til at udvide funktionaliteten af applikationer til Node.js, hvor man kan finde moduler med implementeringer servere<\/a> og HTTP, SMTP, XMPP, DNS, FTP, IMAP, POP3 klienter, moduler til integration med forskellige web-rammer, WebSocket- og Ajax-h\u00e5ndterere, forbindelser til DBMS (MySQL, PostgreSQL, SQLite, MongoDB), templating-motorer, CSS-motorer, implementeringer af kryptografi-algoritmer og autorisationssystemer (OAuth), XML-parsere. <\/p>\n For the handling of a large number of parallel requests, Node.js utilizes an asynchronous code execution model based on event-driven, non-blocking I\/O and the definition of callback handlers. It supports multiplexing methods such as epoll, kqueue, \/dev\/poll, and select. The libuv library, which acts as a wrapper over libev in Unix systems and IOCP in Windows, is used for connection multiplexing. A thread pool is created using the libeio library, and for performing non-blocking DNS queries, c-ares is integrated. All blocking system calls are executed within the thread pool and then, similar to signal handlers, relay their results back via an unnamed pipe. JavaScript code execution is facilitated through the V8 engine developed by Google (Microsoft also develops a Node.js variant with the Chakra-Core engine). <\/p>\n I sin essence ligner Node.js p\u00e5 Perl AnyEvent, Ruby Event Machine, Python Twisted og implementeringen af events i Tcl, men begivenhedscyklen (event loop) i Node.js er skjult for udvikleren og minder om h\u00e5ndteringen af events i en webapplikation, der k\u00f8rer i en browser. N\u00e5r man skriver applikationer til Node.js, skal man tage h\u00f8jde for s\u00e6regenhederne ved begivenhedsorienteret programmering; for eksempel, i stedet for at udf\u00f8re 'var result = db.query('select..');' med ventetid p\u00e5 afslutningen og efterf\u00f8lgende behandling af resultaterne, anvender Node.js princippet for asynkron udf\u00f8relse, dvs. koden transformeres til 'db.query('select..', function (result) {behandling af resultat});', hvor kontrol straks overg\u00e5r til den videre kode, og resultatet af foresp\u00f8rgslen behandles, efterh\u00e5nden som dataene kommer ind. \u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 Node.js 19.0, \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 JavaScript. Node.js 19 \u043e\u0442\u043d\u0435\u0441\u0451\u043d \u043a \u0432\u0435\u0442\u043a\u0435 \u0441 \u043e\u0431\u044b\u0447\u043d\u044b\u043c \u0441\u0440\u043e\u043a\u043e\u043c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438, \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0431\u0443\u0434\u0443\u0442 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0442\u044c\u0441\u044f \u0434\u043e \u0438\u044e\u043d\u044f 2023 \u0433\u043e\u0434\u0430. \u0412 \u0431\u043b\u0438\u0436\u0430\u0439\u0448\u0438\u0435 \u0434\u043d\u0438 \u0431\u0443\u0434\u0435\u0442 \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0432\u0435\u0442\u043a\u0438 Node.js 18, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442 \u0441\u0442\u0430\u0442\u0443\u0441 LTS \u0438 \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2025 \u0433\u043e\u0434\u0430. \u0421\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 Node.js 16.0 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-105331","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Server JavaScript-platform Node.js 19.0 tilg\u00e6ngelig | ProHoster","description":"Node.js 19.0 er blevet frigivet, en platform til k\u00f8rsel af netv\u00e6rksapplikationer skrevet i JavaScript. 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Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"