{"id":103835,"date":"2022-04-21T15:36:45","date_gmt":"2022-04-21T13:36:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupna-servernaya-javascript-platforma-node-js-18-0"},"modified":"2022-04-21T15:36:45","modified_gmt":"2022-04-21T13:36:45","slug":"dostupna-servernaya-javascript-platforma-node-js-18-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/dostupna-servernaya-javascript-platforma-node-js-18-0","title":{"rendered":"Saadaval on serveripoolne JavaScript platvorm Node.js 18.0.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ilmus Node.js 18.0, JavaScripti v\u00f5rgurakenduste t\u00e4itmise platvorm. Node.js 18.0 kuulub pikaajalise toe harude hulka, kuid see staatus antakse ametlikult alles oktoobris p\u00e4rast stabiliseerimist. Node.js 18.x toetust pakutakse aprillini 2025. Aja jooksul kestab eelmise LTS-haru Node.js 16.x toetus aprillini 2024, ja eelmise LTS-haru 14.x kuni aprillini 2023. LTS-haru 12.x toetamine l\u00f5peb 30. aprillil ning vahepealse haru Node.js 17.x toetus l\u00f5peb 1. juunil.     <\/p>\n<p>Peamised t\u00e4iustused:  <\/p>\n<ul>\n<li class=\"l\"> V8 mootor on uuendatud versioonile 10.1, mida kasutatakse Chromium 101-s. V\u00f5rreldes Node.js 17.9.0 v\u00e4ljaandega on lisatud sellised funktsioonid nagu findLast ja findLastIndex, mis v\u00f5imaldavad otsida elemente massiivi l\u00f5pust ning Intl.supportedValuesOf funktsioon. API Intl.Locale on paranenud. Klasside v\u00e4ljade ja privaatsete meetodite algatamine on kiirem.\n<li class=\"l\"> Eksperimentaalne API fetch() on vaikimisi sisse l\u00fclitatud, mis on m\u00f5eldud ressursside v\u00f5rgu kaudu allalaadimiseks. Realiseerimine p\u00f5hineb HTTP\/1.1 kliendi undici koodil ja on maksimaalselt sarnane brauserites pakutavale analoogsele API-le. Sealhulgas on toetatud FormData, Headers, Request ja Response liideseid HTTP-p\u00f6idete ja vastuste manipuleerimiseks.         const res = await fetch('https:\/\/nodejs.org\/api\/documentation.json');     if (res.ok) {       const data = await res.json();       console.log(data);     }\n<li class=\"l\"> Lisatud on eksperimentaalne Web Streams API teostus, mis annab juurdep\u00e4\u00e4su v\u00f5rgu kaudu saadud andmevoogudele. API v\u00f5imaldab lisada oma t\u00f6\u00f6tlejad andmete t\u00f6\u00f6tlemiseks andmete voolamisel, ootamata kogu faili laadimist. Node.js-s on n\u00fc\u00fcd saadaval sellised objektid nagu ReadableStream*, TransformStream*, WritableStream*, TextEncoderStream, TextDecoderStream, CompressionStream ja DecompressionStream.\n<li class=\"l\"> Stabiilseks on muudetud API Blob, mis v\u00f5imaldab kapseldada muutumatuid toorandmeid nende turvaliseks kasutamiseks erinevates t\u00f6\u00f6voogudes.\n<li class=\"l\"> Stabiilseks muudetud API BroadcastChannel, mis v\u00f5imaldab korraldada s\u00f5numite vahetust as\u00fcnkroonselt formaadis '\u00fcks saatja - mitu saajat'.\n<li class=\"l\"> Lisatud on eksperimentaalne moodul node:test JavaScriptis testide loomiseks ja k\u00e4ivitamiseks, mis tagastavad tulemuse TAP (Test Anything Protocol) formaadis.\n<li class=\"l\"> Valmistatud on valmis pakette Red Hat Enterprise Linux (RHEL) 8 ja teiste Glibc 2.28+ p\u00f5histe distributsioonide jaoks, sealhulgas Debian 10 ja Ubuntu 20.04, samuti macOS 10.15+ jaoks. V8 mootori koostamisprobleemide t\u00f5ttu on 32-bitiste Windowsi paketide loomine ajutiselt peatatud.\n<li class=\"l\"> Eksperimentaalne v\u00f5imalus Node.js t\u00e4itmisfaili koostamiseks valitud kasutaja komponentidega, mis initsialiseeritakse k\u00e4ivitamisel, on n\u00fc\u00fcd saadaval. Algkomponentide m\u00e4\u00e4ramiseks on koostamisskripti configure lisatud valik '--node-snapshot-main', n\u00e4iteks '.\/configure --node-snapshot-main=marked.js; name node'          <\/ul>\n<p>Node.js platvormi saab kasutada nii veebirakenduste serveripoolseks toe tagamiseks kui ka tavaliste klient-serveri v\u00f5rgurakenduste loomiseks. Node.js jaoks on v\u00e4lja t\u00f6\u00f6tatud suur moodulite kogumik, kust leiate mooduleid, mis h\u00f5lmavad  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/server\/\"   title=\"serverid\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1641\">serverid<\/a> HTTP, SMTP, XMPP, DNS, FTP, IMAP, POP3 kliente, mooduleid erinevate veebiraamistike integreerimiseks, WebSocket ja Ajax t\u00f6\u00f6tlejat, andmebaasi \u00fchendusi (MySQL, PostgreSQL, SQLite, MongoDB), malligeneraatorid, CSS-mootorid, kr\u00fcptoalgoritmide rakendused ja autentimiss\u00fcsteemid (OAuth), XML-parsereid.    <\/p>\n<p> Suurte paralleelsete p\u00e4ringute t\u00f6\u00f6tlemise tagamiseks kasutab Node.js as\u00fcnkroonset koodik\u00e4ivitamise mudelit, mis p\u00f5hineb mitteblokeerival s\u00fcndmust\u00f6\u00f6tlusel ja tagasiside t\u00f6\u00f6tlejate m\u00e4\u00e4ramisel. \u00dchenduste multiplexerimise meetoditeks on sellised meetodid nagu epoll, kqueue, \/dev\/poll ja select. \u00dchenduste multiplexerimiseks kasutatakse libuv teeki, mis on libevi peal Unix-s\u00fcsteemides ja IOCP peal Windowsis. T\u00f6\u00f6de v\u00f5rgu loomise jaoks kasutatakse libeio teeki, niisuguste mitteblokeerivate DNS-p\u00e4ringute t\u00f6\u00f6tlemiseks on integreeritud c-ares. K\u00f5ik s\u00fcsteemikutsed, mis p\u00f5hjustavad blokeerimist, toimuvad teede grupis ja edastavad seej\u00e4rel oma t\u00f6\u00f6 tulemuse tagasi anon\u00fc\u00fcmse kanali kaudu (pipe). JavaScripti koodi t\u00e4itmine toimub Google'i v\u00e4lja t\u00f6\u00f6tatud V8 mootori kaudu (Microsoft arendab lisaks versiooni Node.js Chakra-Core mootori kasutades).        <\/p>\n<p>Node.js on oma olemuselt sarnane Perl AnyEvent, Ruby Event Machine, Python Twisted ja Tcl'i s\u00fcndmuste rakendustega, kuid Node.js s\u00fcndmust\u00f6\u00f6tlus ts\u00fckkel on arendajalt varjatud ja meenutab s\u00fcndmuste t\u00f6\u00f6tlemist veebirakenduses, mis t\u00f6\u00f6tab brauseris. Node.js rakenduste kirjutamisel tuleb arvestada s\u00fcndmep\u00f5hise programmeerimise erip\u00e4ra; n\u00e4iteks, selle asemel et k\u00e4ivitada 'var result = db.query('select..');' oodates selle l\u00f5petamist ja seej\u00e4rel tulemuste t\u00f6\u00f6tlemist, kasutatakse Node.js-is as\u00fcnkroonse t\u00e4itmise p\u00f5him\u00f5tet, st koodi muudetakse kujule 'db.query('select..', function (result) {tulemuse t\u00f6\u00f6tlemine});', mille k\u00e4igus kaob juhtimine koheselt edasisele koodile ning p\u00e4ringu tulemus t\u00f6\u00f6deldakse andmete saabumise ajal.      <\/p>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57054\">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 18.0, \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 18.0 \u043e\u0442\u043d\u0435\u0441\u0451\u043d \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 18.x \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 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.x \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2024 \u0433\u043e\u0434\u0430, \u0430 \u043f\u043e\u0437\u0430\u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 14.x [&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-103835","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f 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