{"id":105331,"date":"2022-10-19T09:36:47","date_gmt":"2022-10-19T07:36:47","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupna-servernaya-javascript-platforma-node-js-19-0"},"modified":"2022-10-19T09:36:47","modified_gmt":"2022-10-19T07:36:47","slug":"dostupna-servernaya-javascript-platforma-node-js-19-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/dostupna-servernaya-javascript-platforma-node-js-19-0","title":{"rendered":"El\u00e9rhet\u0151 a Node.js 19.0 szerveroldali JavaScript platform","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Megjelent a Node.js 19.0, a JavaScript nyelv\u0171 h\u00e1l\u00f3zati alkalmaz\u00e1sok futtat\u00e1s\u00e1ra szolg\u00e1l\u00f3 platform. A Node.js 19 a norm\u00e1l t\u00e1mogat\u00e1si f\u00e1zis kateg\u00f3ri\u00e1j\u00e1ba tartozik, friss\u00edt\u00e9seket 2023 j\u00fanius\u00e1ig fognak kiadni. A k\u00f6zelj\u00f6v\u0151ben befejez\u0151dik a Node.js 18 stabiliz\u00e1l\u00e1sa, amely LTS st\u00e1tuszt kap \u00e9s 2025 \u00e1prilis\u00e1ig lesz t\u00e1mogatva. A kor\u00e1bbi LTS v\u00e1ltozat, a Node.js 16.0 t\u00e1mogat\u00e1sa 2023 szeptember\u00e9ig tart, m\u00edg a j\u00f3val kor\u00e1bbi 14.0 LTS verzi\u00f3 t\u00e1mogat\u00e1sa 2023 \u00e1prilis\u00e1ig lesz biztos\u00edtva.       <\/p>\n<p>F\u0151 fejleszt\u00e9sek:  <\/p>\n<ul>\n<li class=\"l\"> A V8 motor friss\u00edtve lett a 10.7-es verzi\u00f3ra, amely a Chromium 107-ben tal\u00e1lhat\u00f3. Az engine Node.js 18-hoz viszony\u00edtott v\u00e1ltoz\u00e1sai k\u00f6z\u00f6tt eml\u00edt\u00e9st nyert a harmadik verzi\u00f3j\u00e1nak API-j\u00e1nak, az Intl.NumberFormat-nak a megval\u00f3s\u00edt\u00e1sa, amely \u00faj funkci\u00f3kat, mint formatRange(), formatRangeToParts() \u00e9s selectRange(), \u00faj csoportos\u00edt\u00e1si lehet\u0151s\u00e9geket, \u00faj kerek\u00edt\u00e9si opci\u00f3kat \u00e9s pontoss\u00e1g megad\u00e1s\u00e1t, valamint a sz\u00e1mok dek\u00f3dol\u00e1s\u00e1nak lehet\u0151s\u00e9g\u00e9t k\u00edn\u00e1lja. Emellett friss\u00edtve lettek a csomagban szerepl\u0151 f\u00fcgg\u0151s\u00e9gek, a llhttp 8.1.0 \u00e9s npm 8.19.2.\n<li class=\"l\"> Javascripthoz javasolt egy k\u00eds\u00e9rleti parancs, a &#171;node &#8212;watch&#187;, amely megval\u00f3s\u00edtja a figyel\u00e9si m\u00f3dot, ami automatikusan \u00fajraind\u00edtja a folyamatot a bet\u00f6lt\u00f6tt f\u00e1jl v\u00e1ltoz\u00e1sa eset\u00e9n (p\u00e9ld\u00e1ul a &#171;node &#8212;watch index.js&#187; parancs v\u00e9grehajt\u00e1sakor a folyamat automatikusan \u00fajraindul, ha az index.js megv\u00e1ltozik).\n<li class=\"l\"> Minden kimen\u0151 HTTP\/HTTPS kapcsolatn\u00e1l aktiv\u00e1lva lett a HTTP 1.1 Keep-Alive mechanizmus t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi, hogy a kapcsolatot egy bizonyos ideig nyitva tarts\u00e1k, \u00edgy t\u00f6bb HTTP-k\u00e9relmet dolgozhatnak fel egyetlen kapcsolaton bel\u00fcl. A Keep-Alive haszn\u00e1lat\u00e1val n\u00f6velni lehet a s\u00e1vsz\u00e9less\u00e9get \u00e9s a teljes\u00edtm\u00e9nyt. Alap\u00e9rtelmezettk\u00e9nt a kapcsolat nyitva tart\u00e1s\u00e1nak id\u0151tartama 5 m\u00e1sodpercre van \u00e1ll\u00edtva. A HTTP \u00fcgyf\u00e9l implement\u00e1ci\u00f3j\u00e1ba integr\u00e1lt\u00e1k a Keep-Alive HTTP fejl\u00e9cek \u00e9rtelmez\u00e9s\u00e9nek t\u00e1mogat\u00e1s\u00e1t a v\u00e1laszokban, <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/dts-los-angeles\/\"   title=\"a szerver\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3863\">a szerver<\/a>\u00e9s a Node.js HTTP szerver megval\u00f3s\u00edt\u00e1s\u00e1hoz automatikus lev\u00e1laszt\u00e1st adtak a nem akt\u00edv, Keep-Alive-t haszn\u00e1l\u00f3 kliensek eset\u00e9ben.\n<li class=\"l\"> A stabil API-k k\u00f6z\u00e9 ker\u00fclt a WebCrypto, kiv\u00e9ve azokat a funkci\u00f3kat, amelyek Ed25519, Ed448, X25519 \u00e9s X448 algoritmusokat haszn\u00e1lnak. A WebCrypto modulhoz most a globalThis.crypto vagy a require(&#8216;node:crypto&#8217;).webcrypto haszn\u00e1lat\u00e1val lehet hozz\u00e1f\u00e9rni.\n<li class=\"l\"> Elt\u00e1vol\u00edtott\u00e1k a DTrace, SystemTap \u00e9s ETW (Event Tracing for Windows) nyomk\u00f6vet\u0151 eszk\u00f6z\u00f6k t\u00e1mogat\u00e1s\u00e1t, mivel a karbantart\u00e1suk nem volt c\u00e9lszer\u0171 a megfelel\u0151 t\u00e1mogat\u00e1si terv hi\u00e1nya miatt.            <\/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=\"1665\">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=57938\">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 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 [&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-105331","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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. 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