{"id":39242,"date":"2019-10-31T22:28:38","date_gmt":"2019-10-31T19:28:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-servernoj-javascript-platformy-node-js-13-0\/"},"modified":"2019-10-31T22:28:38","modified_gmt":"2019-10-31T19:28:38","slug":"vypusk-servernoj-javascript-platformy-node-js-13-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/vypusk-servernoj-javascript-platformy-node-js-13-0","title":{"rendered":"Lansarea platformei server-side JavaScript Node.js 13.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/en\/blog\/release\/v13.0.0\/\">Disponibil<\/a><\/noindex> lansare <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\">Node.js 13.0<\/a><\/noindex>, platforme pentru executarea aplica\u021biilor de re\u021bea pe JavaScript. \u00cen acela\u0219i timp, s-a finalizat stabilizarea versiunii anterioare Node.js 12.x, care a fost mutat\u0103 \u00een categoria versiunilor cu suport pe termen lung, actualiz\u0103rile pentru acestea fiind lansate timp de 4 ani. Suportul pentru versiunea LTS anterioar\u0103 Node.js 10.0 va dura p\u00e2n\u0103 \u00een aprilie 2021, iar pentru versiunea LTS precedent\u0103 8.0 p\u00e2n\u0103 \u00een ianuarie 2020.<\/p>\n<p>Principalele <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/@nodejs\/node-js-12-to-lts-and-node-js-13-is-here-e28d6a4a2bd\">\u00eembun\u0103t\u0103\u021biri<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Motorul V8 a fost actualizat la versiunea <noindex><a rel=\"nofollow\" href=\"https:\/\/v8.dev\/\">7.8<\/a><\/noindex>, care include noi metode de optimizare a performan\u021bei, \u00eembun\u0103t\u0103\u021birea destructur\u0103rii obiectelor, reducerea consumului de memorie \u0219i scurtarea timpului de preg\u0103tire pentru execu\u021bia WebAssembly;\n<li class=\"l\"> Suportul complet pentru interna\u021bionalizare \u0219i Unicode bazat pe biblioteci este activat implicit <noindex><a rel=\"nofollow\" href=\"http:\/\/site.icu-project.org\/\">ICU<\/a><\/noindex> (Componente Interna\u021bionale pentru Unicode), care permite dezvoltatorilor s\u0103 scrie cod <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/api\/intl.html#intl_providing_icu_data_at_runtime\">care<\/a><\/noindex> sprijin\u0103\n<li class=\"l\"> lucrul cu diferite limbi \u0219i locale. Modulul full-icu este acum instalat implicit; <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/api\/worker_threads.html\">API-ul<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/@Trott\/using-worker-threads-in-node-js-80494136dbb6\">permi\u021b\u00e2nd<\/a><\/noindex> Workers Threads\n<li class=\"l\"> permite crearea de bucle de procesare a evenimentelor pe mai multe fire (event loop). Implementarea se bazeaz\u0103 pe modulul worker_threads, care permite rularea codului JavaScript \u00een mai multe fire paralele. Suportul stabil pentru API-ul Workers Threads a fost, de asemenea, exportat \u00een versiunea LTS Node.js 12.x; <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nodejs\/node\/blob\/master\/BUILDING.md#platform-list\">este necesar<\/a><\/noindex> Cerin\u021bele pentru platforme au fost crescut. Pentru compilare este necesar acum\n<li class=\"l\"> cel pu\u021bin macOS 10.11 (se necesit\u0103 Xcode 10), AIX 7.2, Ubuntu 16.04, Debian 9, EL 7, Alpine 3.8, Windows 7\/2008;\n<li class=\"l\"> A fost eliminat\u0103 vechea implementare a parserului HTTP (&#171;&#8212;http-parser=legacy&#187;). Au fost eliminate sau mutate \u00een categoria deprecated apeluri \u0219i propriet\u0103\u021bi precum FSWatcher.prototype.start(), ChildProcess._channel, metoda open() \u00een obiectele ReadStream \u0219i WriteStream, request.connection, response.connection, module.createRequireFromPath();\n<li class=\"l\"> A fost eliminat\u0103 vechea implementare a parser-ului HTTP (\u201e--http-parser=legacy\u201d). Au fost eliminate sau transformate \u00een apeluri \u0219i propriet\u0103\u021bi deprecate FSWatcher.prototype.start(), ChildProcess._channel, metoda open() \u00een obiectele ReadStream \u0219i WriteStream, request.connection, response.connection, module.createRequireFromPath(); <noindex><a rel=\"nofollow\" href=\"https:\/\/nodejs.org\/en\/blog\/release\/v13.0.1\/\">a fost lansat\u0103<\/a><\/noindex> Urm\u0103toarea\n<\/ul>\n<p>actualizare 13.0.1, \u00een care au fost corectate c\u00e2teva erori. Printre acestea, a fost rezolvat\u0103 problema cu avertismentul privind utilizarea unei versiuni nesuportate \u00een npm 6.12.0. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.npmjs.com\/\">Reamintim c\u0103 platforma Node.js poate fi utilizat\u0103 at\u00e2t pentru \u00eentre\u021binerea serverului aplica\u021biilor web, c\u00e2t \u0219i pentru crearea de programe de re\u021bea client-server obi\u0219nuite. Pentru a extinde func\u021bionalit\u0103\u021bile aplica\u021biilor Node.js, a fost preg\u0103tit\u0103 o mare<\/a><\/noindex>, care poate g\u0103si module pentru implementarea serverelor \u0219i clien\u021bilor HTTP, SMTP, XMPP, DNS, FTP, IMAP, POP3, module pentru integrarea cu diferite framework-uri web, gestionari WebSocket \u0219i Ajax, conectori pentru SGBD-uri (MySQL, PostgreSQL, SQLite, MongoDB), motoruri de template-uri, CSS, implement\u0103ri de algoritmi criptografici \u0219i sisteme de autorizare (OAuth), parsere XML.<\/p>\n<p> Pentru a asigura procesarea unui num\u0103r mare de cereri paralele, Node.js folose\u0219te un model de execu\u021bie a codului asincron, bazat pe gestionarea evenimentelor \u00eentr-un mod non-blocant \u0219i definirea gestionatorilor de callback. Ca metode de multiplexare a conexiunilor, sunt sus\u021binute metode precum epoll, kqueue, \/dev\/poll \u0219i select. Pentru multiplexarea conexiunilor se folose\u0219te biblioteca <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libuv\/libuv\">libuv<\/a><\/noindex>, care este un strat deasupra <noindex><a rel=\"nofollow\" href=\"http:\/\/software.schmorp.de\/pkg\/libev.html\">libev<\/a><\/noindex> \u00een sistemele Unix \u0219i deasupra IOCP \u00een Windows. Pentru a crea un pool de fire de execu\u021bie (thread pool), se folose\u0219te biblioteca <noindex><a rel=\"nofollow\" href=\"http:\/\/software.schmorp.de\/pkg\/libeio.html\">libeio<\/a><\/noindex>, pentru a efectua cereri DNS \u00eentr-un mod non-blocant este integrat <noindex><a rel=\"nofollow\" href=\"http:\/\/c-ares.haxx.se\/\">c-ares<\/a><\/noindex>. Toate apelurile de sistem care genereaz\u0103 blocare sunt efectuate \u00een interiorul pool-ului de fire \u0219i apoi, la fel ca gestionarii de semnale, transmit rezultatul muncii lor \u00eenapoi printr-un canal anonimizat (pipe). Executarea codului JavaScript este asigurat\u0103 prin utilizarea motorului dezvoltat de Google <noindex><a rel=\"nofollow\" href=\"http:\/\/code.google.com\/p\/v8\/\">V8<\/a><\/noindex> (\u00een plus, Microsoft dezvolt\u0103 o variant\u0103 Node.js cu motorul Chakra-Core).  <\/p>\n<p>\u00cen esen\u021b\u0103, Node.js este similar cu framework-urile <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> \u0219i <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.tcl.tk\/1527\">implementarea<\/a><\/noindex> evenimentelor \u00een Tcl, dar ciclul de procesare a evenimentelor (event loop) \u00een Node.js este ascuns de dezvoltator \u0219i seam\u0103n\u0103 cu procesarea evenimentelor dintr-o aplica\u021bie web care ruleaz\u0103 \u00een browser. Atunci c\u00e2nd scrie\u021bi aplica\u021bii pentru Node.js, trebuie s\u0103 \u021bine\u021bi cont de specificul program\u0103rii orientate pe evenimente, de exemplu, \u00een loc de a executa &#171;var result = db.query(&#171;select..&#187;);&#187; a\u0219tept\u00e2nd finalizarea lucr\u0103rii \u0219i procesarea ulterioar\u0103 a rezultatelor, \u00een Node.js se folose\u0219te principiul execu\u021biei asincrone, adic\u0103 codul este transformat \u00een &#171;db.query(&#171;select..&#187;, function (result) {procesarea rezultatului});&#187;, moment \u00een care controlul se va transfera imediat la codul ulterior, iar rezultatul interog\u0103rii va fi procesat pe m\u0103sur\u0103 ce datele devin disponibile. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51741\">opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 Node.js 13.0, \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. \u041e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 Node.js 12.x, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0435\u043d\u0430 \u0432 \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u044e \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u0432 \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, \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u044e\u0442\u0441\u044f \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0435 4 \u043b\u0435\u0442. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 Node.js 10.0 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2021 \u0433\u043e\u0434\u0430, \u0430 \u043f\u043e\u0437\u0430\u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 8.0 \u0434\u043e \u044f\u043d\u0432\u0430\u0440\u044f 2020 \u0433\u043e\u0434\u0430. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 [&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-39242","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 Node.js 13.0, \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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