{"id":78969,"date":"2020-04-23T13:42:02","date_gmt":"2020-04-23T11:42:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-servernoj-javascript-platformy-node-js-14-0"},"modified":"2020-04-23T13:42:02","modified_gmt":"2020-04-23T11:42:02","slug":"vypusk-servernoj-javascript-platformy-node-js-14-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/vypusk-servernoj-javascript-platformy-node-js-14-0","title":{"rendered":"Utgivning av serverplattformen Node.js 14.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/en\/blog\/release\/v14.0.0\/\">H\u00e4ndelse genomf\u00f6rd<\/a><\/noindex> utgivning <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\">Node.js 14.0<\/a><\/noindex>, en plattform f\u00f6r att k\u00f6ra n\u00e4tverksapplikationer i JavaScript. Node.js 14.0 tillh\u00f6r linjer med l\u00e5ngsiktigt st\u00f6d, men denna status kommer att ges f\u00f6rst i oktober efter stabilisering. St\u00f6det f\u00f6r Node.js 14.0 kommer att <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nodejs\/Release\">genomf\u00f6ras<\/a><\/noindex> till april 2023. Underh\u00e5llet f\u00f6r den tidigare LTS-linjen Node.js 12.0 kommer att p\u00e5g\u00e5 till april 2022, och den f\u00f6reg\u00e5ende LTS-linjen 10.0 till april 2021. St\u00f6det f\u00f6r den interimistiska linjen 13.x avslutas i juni i \u00e5r.<\/p>\n<p>Huvud <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/@nodejs\/node-js-version-14-available-now-8170d384567e\">f\u00f6rb\u00e4ttringar<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> M\u00f6jligheten att generera diagnosrapporter <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/the-node-js-collection\/easily-identify-problems-in-node-js-applications-with-diagnostic-report-dc82370d8029\">har stabiliserats<\/a><\/noindex>, d\u00e4r h\u00e4ndelser \u00e5terspeglas som hj\u00e4lper till att diagnostisera problem som krasch, prestandaf\u00f6rluster, minnesl\u00e4ckage, h\u00f6g CPU-belastning, of\u00f6rutsedda felutskrifter, osv.\n<li class=\"l\"> Experimentellt st\u00f6d f\u00f6r API:et <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/api\/async_hooks.html#async_hooks_class_asynclocalstorage\">Async Local Storage<\/a><\/noindex> har lagts till, med implementeringen av klassen AsyncLocalStorage, som kan anv\u00e4ndas f\u00f6r att skapa asynkront tillst\u00e5nd med callback-baserade hanterare och promise. AsyncLocalStorage g\u00f6r det m\u00f6jligt att lagra data under bearbetningen av webbf\u00f6rfr\u00e5gningar, liknande tr\u00e5d-lokala lagringsutrymmen i andra spr\u00e5k.\n<li class=\"l\"> Varningen om experimentell funktion har tagits bort vid inladdning <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nodejs\/node\/blob\/master\/doc\/api\/esm.md\">moduler<\/a><\/noindex>  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=42450\">ECMAScript 6<\/a><\/noindex> som importeras och exporteras med hj\u00e4lp av uttryck f\u00f6r import och export. Observera att sj\u00e4lva implementeringen av ESM-moduler fortfarande \u00e4r experimentell.\n<li class=\"l\"> V8-motorn har uppdaterats till version <noindex><a rel=\"nofollow\" href=\"https:\/\/v8.dev\/\">8.1<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52000\">1<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52565\">2<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52312\">3<\/a><\/noindex>), \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0432\u043d\u0435\u0441\u0435\u043d\u044b \u043d\u043e\u0432\u044b\u0435 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0438 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u044b \u0442\u0430\u043a\u0438\u0435 \u043d\u043e\u0432\u0448\u0435\u0441\u0442\u0432\u0430, \u043a\u0430\u043a \u043d\u043e\u0432\u044b\u0439 \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440 \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f &#171;??&#187; (\u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u043f\u0440\u0430\u0432\u044b\u0439 \u043e\u043f\u0435\u0440\u0430\u043d\u0434, \u0435\u0441\u043b\u0438 \u043b\u0435\u0432\u044b\u0439 \u043e\u043f\u0435\u0440\u0430\u043d\u0434 \u0438\u043c\u0435\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 NULL \u0438\u043b\u0438 undefined, \u0438 \u043d\u0430\u043e\u0431\u043e\u0440\u043e\u0442),  \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440 &#171;?.&#187; \u0434\u043b\u044f \u0435\u0434\u0438\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0432\u0441\u0435\u0439 \u0446\u0435\u043f\u043e\u0447\u043a\u0438 \u0441\u0432\u043e\u0439\u0441\u0442\u0432 \u0438\u043b\u0438 \u0432\u044b\u0437\u043e\u0432\u043e\u0432 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 &#171;db?.user?.name?.length&#187; \u0431\u0435\u0437 \u043f\u0440\u0435\u0434\u0432\u0430\u0440\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043f\u0440\u043e\u0432\u0435\u0440\u043e\u043a), \u043c\u0435\u0442\u043e\u0434 Intl.DisplayName \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u043b\u043e\u043a\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0439 \u0438 \u0442.\u043f.\n<li class=\"l\"> \u041f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0430 \u0440\u0435\u0432\u0438\u0437\u0438\u044f API Streams, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u0430\u044f \u043d\u0430 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0435 \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043d\u043d\u043e\u0441\u0442\u0438 API-\u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u043e\u0432 Streams \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0440\u0430\u0437\u043b\u0438\u0447\u0438\u0439 \u0432 \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0438 \u0431\u0430\u0437\u043e\u0432\u044b\u0445 \u0447\u0430\u0441\u0442\u0435\u0439 Node.js. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0435 http.OutgoingMessage \u043f\u0440\u0438\u0431\u043b\u0438\u0436\u0435\u043d\u043e \u043a stream.Writable, \u0430  net.Socket \u043a stream.Duplex. \u041e\u043f\u0446\u0438\u044f autoDestroy \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432\u044b\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0430 \u0432 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 &#171;true&#187;, \u043f\u043e\u0434\u0440\u0430\u0437\u0443\u043c\u0435\u0432\u0430\u044e\u0449\u0435\u0435 \u0432\u044b\u0437\u043e\u0432 &#171;_destroy&#187; \u043f\u043e\u0441\u043b\u0435 \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f.\n<li class=\"l\"> Experimentellt st\u00f6d f\u00f6r API:et <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/api\/wasi.html\">WASI<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50406\">WebAssembly System Interface<\/a><\/noindex>), som tillhandah\u00e5ller programmeringsgr\u00e4nssnitt f\u00f6r direkt interaktion med operativsystemet (POSIX API f\u00f6r filhantering, sockets osv.).\n<li class=\"l\"> Krav har \u00f6kats p\u00e5 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nodejs\/node\/blob\/v12.x\/BUILDING.md#platform-list\">minimi versioner<\/a><\/noindex> kompilatorer och plattformar: macOS 10.13 (High Sierra), GCC 6,  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nodejs\/node\/pull\/31954\">Windows nyare \u00e4n 7\/2008R2<\/a><\/noindex>.\n<\/ul>\n<p>Vi p\u00e5minner om att Node.js-plattformen kan anv\u00e4ndas b\u00e5de f\u00f6r serverh\u00e5llning av webapplikationer och f\u00f6r att skapa vanliga klient- och servern\u00e4tverksprogram. F\u00f6r att ut\u00f6ka funktionaliteten i applikationer f\u00f6r Node.js har en stor <noindex><a rel=\"nofollow\" href=\"https:\/\/www.npmjs.com\/\">samling av moduler<\/a><\/noindex>, som inneh\u00e5ller moduler med implementationer av HTTP-, SMTP-, XMPP-, DNS-, FTP-, IMAP-, POP3-servrar och klienter, moduler f\u00f6r integration med olika webbramverk, WebSocket och Ajax hanterare, kopplingar till databaser (MySQL, PostgreSQL, SQLite, MongoDB), mallmotorer, CSS-motorer, implementationer av kryptografi-algoritmer och autentiseringssystem (OAuth), XML-parsers.<\/p>\n<p> F\u00f6r att hantera ett stort antal parallella f\u00f6rfr\u00e5gningar anv\u00e4nder Node.js en asynkron kodk\u00f6rningsmodell baserad p\u00e5 h\u00e4ndelsehantering i icke-blockerande l\u00e4ge och definiering av callback-hanterare. Metoder som epoll, kqueue, \/dev\/poll och select st\u00f6ds f\u00f6r anslutningsmultiplexering. F\u00f6r multiplexering av anslutningar anv\u00e4nds biblioteket <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libuv\/libuv\">libuv<\/a><\/noindex>, som \u00e4r ett lager \u00f6ver <noindex><a rel=\"nofollow\" href=\"http:\/\/software.schmorp.de\/pkg\/libev.html\">libev<\/a><\/noindex> i Unix-system och \u00f6ver IOCP i Windows. F\u00f6r att skapa en tr\u00e5dpool anv\u00e4nds biblioteket <noindex><a rel=\"nofollow\" href=\"http:\/\/software.schmorp.de\/pkg\/libeio.html\">libeio<\/a><\/noindex>, f\u00f6r att utf\u00f6ra DNS-f\u00f6rfr\u00e5gningar i icke-blockerande l\u00e4ge \u00e4r <noindex><a rel=\"nofollow\" href=\"http:\/\/c-ares.haxx.se\/\">c-ares<\/a><\/noindex>integrerat. Alla systemanrop som orsakar blockering utf\u00f6rs inom tr\u00e5dpoolen och skickar sedan, precis som signalhanterare, tillbaka resultatet av sitt arbete genom en namnl\u00f6s kanal (pipe). Utf\u00f6rande av JavaScript-kod sker genom anv\u00e4ndning av den motor som utvecklats av Google, <noindex><a rel=\"nofollow\" href=\"http:\/\/code.google.com\/p\/v8\/\">V8<\/a><\/noindex> (dessutom utvecklar Microsoft en version av Node.js med Chakra-Core-motorn).  <\/p>\n<p>I grunden liknar Node.js-ramverken <noindex><a rel=\"nofollow\" href=\"http:\/\/search.cpan.org\/dist\/AnyEvent\/\">Perl AnyEvent<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eventmachine\/eventmachine\">Ruby Event Machine<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"http:\/\/twistedmatrix.com\/\">Python Twisted<\/a><\/noindex> och <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.tcl.tk\/1527\">implementation<\/a><\/noindex> H\u00e4ndelser i Tcl, men h\u00e4ndelsehanteringsloopen (event loop) i Node.js \u00e4r dold f\u00f6r utvecklaren och p\u00e5minner om h\u00e4ndelsehantering i ett webbaserat program som k\u00f6rs i en webbl\u00e4sare. N\u00e4r man skriver applikationer f\u00f6r Node.js m\u00e5ste man ta h\u00e4nsyn till s\u00e4rdragen i eventdriven programmering; till exempel, ist\u00e4llet f\u00f6r att utf\u00f6ra &#171;var result = db.query(&#171;select..&#187;);&#187; med v\u00e4ntan p\u00e5 att processen ska slutf\u00f6ras och efterf\u00f6ljande bearbetning av resultaten, anv\u00e4nds en asynkron k\u00f6rprincip i Node.js, dvs. koden transformeras till &#171;db.query(&#171;select..&#187;, function (result) {bearbeta resultatet});&#187;, d\u00e4r kontrollen omedelbart \u00f6verg\u00e5r till vidare kod, medan resultatet av f\u00f6rfr\u00e5gan bearbetas i takt med att data kommer in. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52786\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 Node.js 14.0, \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 14.0 \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u043a \u0432\u0435\u0442\u043a\u0430\u043c \u0441 \u0434\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c \u0441\u0440\u043e\u043a\u043e\u043c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438, \u043d\u043e \u0434\u0430\u043d\u043d\u044b\u0439 \u0441\u0442\u0430\u0442\u0443\u0441 \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u043e\u043a\u0442\u044f\u0431\u0440\u0435, \u043f\u043e\u0441\u043b\u0435 \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0430\u0446\u0438\u0438. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 Node.js 14.0 \u0431\u0443\u0434\u0435\u0442 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0442\u044c\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2023 \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 12.0 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2022 \u0433\u043e\u0434\u0430, \u0430 \u043f\u043e\u0437\u0430\u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 10.0 [&hellip;]<\/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-78969","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f 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