{"id":111020,"date":"2023-10-21T15:10:15","date_gmt":"2023-10-21T13:10:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupna-servernaya-javascript-platforma-node-js-21-0"},"modified":"2026-02-15T22:30:51","modified_gmt":"2026-02-15T20:30:51","slug":"dostupna-servernaya-javascript-platforma-node-js-21-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/dostupna-servernaya-javascript-platforma-node-js-21-0","title":{"rendered":"El\u00e9rhet\u0151 a szerveroldali JavaScript platform Node.js 21.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Megjelent a Node.js 21.0, a JavaScript nyelven k\u00e9sz\u00fclt h\u00e1l\u00f3zati alkalmaz\u00e1sok futtat\u00e1s\u00e1ra szolg\u00e1l\u00f3 platform. A Node.js 21.0 \u00e1g t\u00e1mogat\u00e1sa 6 h\u00f3napon \u00e1t fog tartani. A k\u00f6vetkez\u0151 napokban befejez\u0151dik a Node.js 20 \u00e1g stabiliz\u00e1l\u00e1sa, amely LTS st\u00e1tuszt kap, \u00e9s 2026 \u00e1prilis\u00e1ig lesz fenntartva. A kor\u00e1bbi LTS \u00e1g, a Node.js 18.0 t\u00e1mogat\u00e1sa 2025 szeptember\u00e9ig tart, m\u00edg a Node.js 16.0 \u00e1g \u00e1pol\u00e1sa 2024 \u00e1prilis\u00e1ig folytat\u00f3dik.         <\/p>\n<p>F\u0151 fejleszt\u00e9sek:  <\/p>\n<ul>\n<li class=\"l\"> Kihirdett\u00e9k a stabil Fetch API-t, amely a h\u00e1l\u00f3zaton kereszt\u00fcli er\u0151forr\u00e1sok let\u00f6lt\u00e9s\u00e9re szolg\u00e1l, \u00e9s megk\u00f6nny\u00edti egy \u00e1ltal\u00e1nos JavaScript-k\u00f3d \u00edr\u00e1s\u00e1t, amely szerver- \u00e9s kliensoldalon is m\u0171k\u00f6dhet. A megval\u00f3s\u00edt\u00e1s az undici HTTP\/1.1 kliens k\u00f3dj\u00e1n alapul, \u00e9s a b\u00f6ng\u00e9sz\u0151kben el\u00e9rhet\u0151 hasonl\u00f3 API-hoz van k\u00f6zel\u00edtve. Az API tartalmazza a fetch() met\u00f3dust \u00e9s a HTTP-fejl\u00e9cet, a k\u00e9r\u00e9s \u00e9s v\u00e1lasz objektumait, a Request \u00e9s a Response-t. 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\"> Stabiliz\u00e1lt\u00e1k a WebStreams API t\u00e1mogat\u00e1s\u00e1t, amely hozz\u00e1f\u00e9r\u00e9st biztos\u00edt a h\u00e1l\u00f3zaton kereszt\u00fcl kapott adatfolyamokhoz. Az API lehet\u0151v\u00e9 teszi saj\u00e1t feldolgoz\u00f3ik hozz\u00e1ad\u00e1s\u00e1t, amelyek az adatok be\u00e9rkez\u00e9s\u00e9vel dolgoznak, an\u00e9lk\u00fcl, hogy megv\u00e1rn\u00e1k az eg\u00e9sz f\u00e1jl let\u00f6lt\u00e9s\u00e9t. A Node.js-ben el\u00e9rhet\u0151k olyan objektumok, mint a ReadableStream*, TransformStream*, WritableStream*, TextEncoderStream, TextDecoderStream, CompressionStream \u00e9s DecompressionStream.\n<li class=\"l\"> Hozz\u00e1adt\u00e1k a WebSocket kliens k\u00eds\u00e9rleti megval\u00f3s\u00edt\u00e1s\u00e1t, <a href=\"https:\/\/prohoster.info\/hu\/ssl-sertifikat\/rapidssl-wildcard\/\"  data-wpil-monitor-id=\"3323\">amely kompatibilis a b\u00f6ng\u00e9sz\u0151kkel.<\/a>. A WebSocket t\u00e1mogat\u00e1s\u00e1nak bekapcsol\u00e1s\u00e1hoz el\u00e9rhet\u0151 a '\u2014experimental-websocket' jelz\u0151.\n<li class=\"l\"> Hozz\u00e1adt\u00e1k az ESM (ECMAScript Modules, a b\u00f6ng\u00e9sz\u0151kben haszn\u00e1lt modulok) alap\u00e9rtelmezett haszn\u00e1lat\u00e1nak k\u00eds\u00e9rleti m\u00f3dj\u00e1t a CommonJS (Node.js-specifikus) helyett. A v\u00e1ltoz\u00e1s nem \u00e9rinti azokat a modulokat, amelyek form\u00e1tum\u00e1t a package.json 'type' mez\u0151je hat\u00e1rozza meg, vagy amelyeket a '\u2014input-type' jelz\u0151 seg\u00edts\u00e9g\u00e9vel v\u00e1lasztanak ki, vagy amelyek kiterjeszt\u00e9se (.mjs az ESM sz\u00e1m\u00e1ra, .cjs a CommonJS-hoz) egy\u00e9rtelm\u0171. Ezenk\u00edv\u00fcl azok a modulok, amelyek nincsenek egy\u00e9rtelm\u0171en CommonJS-k\u00e9nt meghat\u00e1rozva (p\u00e9ld\u00e1ul .js kiterjeszt\u00e9ssel rendelkeznek), a \u00faj m\u00f3d aktiv\u00e1l\u00e1sa sor\u00e1n ESM modulokk\u00e9nt lesznek kezelve. Az \u00faj modulbe\u00e1ll\u00edt\u00e1sok aktiv\u00e1l\u00e1s\u00e1hoz a '\u2014experimental-default-type' jelz\u0151t k\u00edn\u00e1lj\u00e1k.\n<li class=\"l\"> A V8 motor friss\u00edtve lett a 11.8-as verzi\u00f3ra, amely a Chromium 118-ban tal\u00e1lhat\u00f3, \u00e9s t\u00e1mogatja az ArrayBuffer.prototype.transfer met\u00f3dust, a t\u00f6mbcsoportos\u00edt\u00e1s k\u00e9pess\u00e9g\u00e9t (groupBy met\u00f3dus) \u00e9s a WebAssembly konstanskezel\u0151 utas\u00edt\u00e1sait (i32.add, i32.sub, i32.mul, i64.add, i64.sub \u00e9s i64.mul).\n<li class=\"l\"> A globalPreload handler is no longer supported; instead, use the register and initialize calls to configure modules.\n<li class=\"l\"> A fs.writeFile f\u00fcggv\u00e9nyhez hozz\u00e1adt\u00e1k a 'flush' opci\u00f3t, amely k\u00e9nyszer\u00edti az adatok t\u00e1rol\u00f3ra val\u00f3 ki\u00edr\u00e1s\u00e1t minden \u00edr\u00e1si m\u0171velet ut\u00e1n.\n<li class=\"l\"> The performance of code related to URL parsing, API fetch, streams, node:fs, and HTTP has been improved.\n<li class=\"l\"> A global navigator object has been added. For example, to obtain data about the number of CPU cores, you can use the navigator.hardwareConcurrency property.\n<li class=\"l\"> A '\u2014test' param\u00e9terhez glob-maszkok t\u00e1mogat\u00e1sa ker\u00fclt be a futtatand\u00f3 tesztek kiv\u00e1laszt\u00e1s\u00e1hoz (p\u00e9ld\u00e1ul megadhat\u00f3 a '\u2014test **\/*.test.js.').\n<li class=\"l\"> The included package manager npm 10.2.0 and parser llhttp 9.1.2 have been updated.\n<li class=\"l\"> Support for Visual Studio 2019 and macOS versions older than 11.0 has been discontinued.         <\/ul>\n<p>A Node.js platform szerver oldali webalkalmaz\u00e1sok m\u0171k\u00f6dtet\u00e9s\u00e9re, valamint hagyom\u00e1nyos kliens \u00e9s szerver h\u00e1l\u00f3zati programok k\u00e9sz\u00edt\u00e9s\u00e9re haszn\u00e1lhat\u00f3. A Node.js alkalmaz\u00e1sok funkcionalit\u00e1s\u00e1nak b\u0151v\u00edt\u00e9se \u00e9rdek\u00e9ben egy nagy modulgy\u0171jtem\u00e9ny k\u00e9sz\u00fclt, amely tartalmaz k\u00fcl\u00f6nb\u00f6z\u0151 megval\u00f3s\u00edt\u00e1s\u00fa modulokat.  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/\"   title=\"szerverek\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1675\">szerverek<\/a> \u00e9s HTTP, SMTP, XMPP, DNS, FTP, IMAP, POP3 klienseket, valamint modulokat k\u00fcl\u00f6nb\u00f6z\u0151 webkeretrendszerek integr\u00e1l\u00e1s\u00e1hoz, WebSocket \u00e9s Ajax kezel\u0151ket, az adatb\u00e1zisokhoz (MySQL, PostgreSQL, SQLite, MongoDB) val\u00f3 kapcsol\u00f3d\u00e1sokat, sablongener\u00e1torokat, CSS-motorokat, kriptogr\u00e1fiai algoritmusok \u00e9s hiteles\u00edt\u00e9si rendszerek (OAuth) megval\u00f3s\u00edt\u00e1sait, XML-parsereket.    <\/p>\n<p> A sz\u00e1mos p\u00e1rhuzamos k\u00e9r\u00e9s feldolgoz\u00e1s\u00e1nak biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben a Node.js aszinkron k\u00f3dv\u00e9grehajt\u00e1si modellt haszn\u00e1l, amely esem\u00e9nyek alapj\u00e1n m\u0171k\u00f6dik, blokkol\u00e1smentes \u00fczemm\u00f3dban, \u00e9s callback kezel\u0151k defini\u00e1l\u00e1s\u00e1val. A kapcsolatok multiplexel\u00e9s\u00e9re olyan m\u00f3dszerek \u00e1llnak rendelkez\u00e9sre, mint az epoll, kqueue, \/dev\/poll \u00e9s select. A kapcsolatok multiplexel\u00e9s\u00e9re a libuv k\u00f6nyvt\u00e1rat haszn\u00e1lj\u00e1k, amely a libev f\u00f6l\u00e9 \u00e9p\u00fcl Unix rendszerekben \u00e9s az IOCP-t a Windows rendszerekben. A sz\u00e1lmedence (thread pool) l\u00e9trehoz\u00e1s\u00e1hoz a libeio k\u00f6nyvt\u00e1rat haszn\u00e1lj\u00e1k, m\u00edg a blokkol\u00e1smentes DNS-k\u00e9r\u00e9sek v\u00e9grehajt\u00e1s\u00e1hoz a c-ares integr\u00e1lva van. Minden blokkol\u00e1sos rendszersz\u00f3 h\u00edv\u00e1s a sz\u00e1lmedenc\u00e9n bel\u00fcl hajt\u00f3dik v\u00e9gre, \u00e9s a jelek kezel\u0151ihez hasonl\u00f3an az eredm\u00e9ny\u00fcket egy n\u00e9vtelen cs\u00f6v\u00f6n (pipe) kereszt\u00fcl adj\u00e1k vissza. A JavaScript-k\u00f3d v\u00e9grehajt\u00e1s\u00e1t a Google \u00e1ltal kifejlesztett V8 motor ig\u00e9nybev\u00e9tel\u00e9vel biztos\u00edtj\u00e1k (tov\u00e1bb\u00e1 a Microsoft kifejleszti a Node.js egy v\u00e1ltozat\u00e1t a Chakra-Core motorral).        <\/p>\n<p>A Node.js l\u00e9nyeg\u00e9ben hasonl\u00f3 a Perl AnyEvent, Ruby Event Machine, Python Twisted keretrendszerekhez, valamint a Tcl esem\u00e9nykezel\u00e9s\u00e9hez, de a Node.js event loop-ja rejtve van a fejleszt\u0151k el\u0151l, \u00e9s hasonl\u00edt a b\u00f6ng\u00e9sz\u0151ben fut\u00f3 webalkalmaz\u00e1sok esem\u00e9nykezel\u00e9s\u00e9re. Node.js alkalmaz\u00e1sok \u00edr\u00e1sakor figyelembe kell venni az esem\u00e9nyorient\u00e1lt programoz\u00e1s saj\u00e1toss\u00e1gait; p\u00e9ld\u00e1ul ahelyett, hogy a &#171;var result = db.query(&#171;select..&#187;);&#187; k\u00f3dot v\u00e1rakoztatva futtassuk \u00e9s k\u00e9s\u0151bb dolgozzuk fel az eredm\u00e9nyeket, a Node.js aszinkron v\u00e9grehajt\u00e1si elvet alkalmaz, azaz a k\u00f3d &#171;db.query(&#171;select..&#187;, function (result) {eredm\u00e9ny feldolgoz\u00e1sa});&#187; form\u00e1ban alakul, \u00edgy a vez\u00e9rl\u00e9s azonnal \u00e1tad\u00f3dik a tov\u00e1bbi k\u00f3dnak, m\u00edg az eredm\u00e9ny a be\u00e9rkez\u0151 adatok alapj\u00e1n lesz feldolgozva.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=59969\">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 21.0, \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. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0432\u0435\u0442\u043a\u0438 Node.js 21.0 \u0431\u0443\u0434\u0435\u0442 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0442\u044c\u0441\u044f \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0435 6 \u043c\u0435\u0441\u044f\u0446\u0435\u0432. \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 20, \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 2026 \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 18.0 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f 2025 \u0433\u043e\u0434\u0430, \u0430 \u043f\u043e\u0437\u0430\u043f\u0440\u043e\u0448\u043b\u043e\u0439 LTS-\u0432\u0435\u0442\u043a\u0438 [&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-111020","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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