{"id":81559,"date":"2020-05-14T19:42:16","date_gmt":"2020-05-14T17:42:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/avtor-node-js-predstavil-zashhishhyonnuyu-javascript-platformu-deno-1-0"},"modified":"2020-05-14T19:42:16","modified_gmt":"2020-05-14T17:42:16","slug":"avtor-node-js-predstavil-zashhishhyonnuyu-javascript-platformu-deno-1-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/avtor-node-js-predstavil-zashhishhyonnuyu-javascript-platformu-deno-1-0","title":{"rendered":"A Node.js szerz\u0151je bemutatta a Deno 1.0 v\u00e9dett JavaScript platformot","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>K\u00e9t \u00e9v fejleszt\u00e9s ut\u00e1n <noindex><a rel=\"nofollow\" href=\"https:\/\/deno.land\/v1\">bemutatva<\/a><\/noindex> els\u0151 jelent\u0151s kiad\u00e1s <noindex><a rel=\"nofollow\" href=\"https:\/\/deno.land\/\">Deno 1.0<\/a><\/noindex>, egy platform az alkalmaz\u00e1sok elk\u00fcl\u00f6n\u00edtett v\u00e9grehajt\u00e1s\u00e1hoz JavaScript \u00e9s TypeScript nyelveken, amely haszn\u00e1lhat\u00f3 szerveroldali feldolgoz\u00f3k l\u00e9trehoz\u00e1s\u00e1ra. A platform fejleszt\u0151je Ryan Dahl (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Ryan_Dahl\">Ryan Dahl<\/a><\/noindex>), a Node.js l\u00e9trehoz\u00f3ja. A Node.js-hez hasonl\u00f3an a Deno is JavaScript motorral m\u0171k\u00f6dik, <noindex><a rel=\"nofollow\" href=\"https:\/\/v8.dev\/\">V8<\/a><\/noindex>, amelyet szint\u00e9n haszn\u00e1lnak a Chromium-alap\u00fa b\u00f6ng\u00e9sz\u0151kben. A Deno azonban nem a Node.js \u00e1gazata, hanem egy teljesen \u00faj projekt, amelyet a semmib\u0151l hoztak l\u00e9tre. A projekt k\u00f3dja <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/denoland\/deno\">terjeszt\u00e9sre ker\u00fcl<\/a><\/noindex> MIT licenc alatt \u00e1ll. A kiad\u00e1sok <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/denoland\/deno\/releases\/tag\/v1.0.0\">kiad\u00e1sok<\/a><\/noindex> Linux, Windows \u00e9s macOS sz\u00e1m\u00e1ra.<\/p>\n<p>A jelent\u0151s verzi\u00f3sz\u00e1m az API stabiliz\u00e1l\u00e1s\u00e1val kapcsolatos a Deno n\u00e9vt\u00e9rben, amely az alkalmaz\u00e1sok \u00e9s az oper\u00e1ci\u00f3s rendszer k\u00f6z\u00f6tti interakci\u00f3\u00e9rt felel\u0151s. Az API-k, amelyek m\u00e9g <noindex><a rel=\"nofollow\" href=\"https:\/\/doc.deno.land\/https\/raw.githubusercontent.com\/denoland\/deno\/master\/cli\/js\/lib.deno.unstable.d.ts\">nem stabiliz\u00e1ltak<\/a><\/noindex>, alap\u00e9rtelmezetten rejtve vannak, \u00e9s csak az &#171;&#8212;unstable&#187; \u00fczemm\u00f3dban \u00e9rhet\u0151k el. Az \u00faj verzi\u00f3k kiad\u00e1sa sor\u00e1n ezek a hasonl\u00f3 API-k fokozatosan stabiliz\u00e1l\u00f3dnak. A glob\u00e1lis n\u00e9vt\u00e9rben l\u00e9v\u0151 API, amely olyan \u00e1ltal\u00e1nos funkci\u00f3kat tartalmaz, mint a setTimeout() \u00e9s a fetch(), lehet\u0151s\u00e9g szerint a szok\u00e1sos web b\u00f6ng\u00e9sz\u0151k API-hoz hasonl\u00f3an alakul, \u00e9s a b\u00f6ng\u00e9sz\u0151kre vonatkoz\u00f3 webes szabv\u00e1nyokkal fejl\u0151dik. A Rust API, amely k\u00f6zvetlen\u00fcl a platform k\u00f3dj\u00e1ban haszn\u00e1latos, valamint a Deno runtime b\u0151v\u00edtm\u00e9nyek fejleszt\u00e9s\u00e9re szolg\u00e1l\u00f3 interf\u00e9sz m\u00e9g nem stabiliz\u00e1lt, \u00e9s tov\u00e1bbra is fejl\u0151dik.<\/p>\n<p>A \u00faj JavaScript platform l\u00e9trehoz\u00e1s\u00e1nak kulcsfontoss\u00e1g\u00fa indokai k\u00f6z\u00e9 tartozik a Node.js architekt\u00far\u00e1j\u00e1ban elk\u00f6vetett koncepcion\u00e1lis hib\u00e1k kik\u00fcsz\u00f6b\u00f6l\u00e9se, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/watch?v=M3BM9TB-8yA\">amelyek<\/a><\/noindex> el\u0151fordultak, \u00e9s biztons\u00e1gosabb k\u00f6rnyezet biztos\u00edt\u00e1sa a felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra. A biztons\u00e1g n\u00f6vel\u00e9se \u00e9rdek\u00e9ben a V8 motor k\u00f6r\u00fcli k\u00f6t\u00e9s Rust nyelven k\u00e9sz\u00fclt, amely elker\u00fcli a mem\u00f3ria alacsony szint\u0171 kezel\u00e9se miatt fell\u00e9p\u0151 sz\u00e1mos sebezhet\u0151s\u00e9get, mint p\u00e9ld\u00e1ul a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1ni hivatkoz\u00e1s, a null pointer derefer\u00e1l\u00e1sa \u00e9s a puffersz\u00e1ml\u00e1l\u00e1sok t\u00fall\u00e9p\u00e9se. A nem blokkol\u00f3 k\u00e9r\u00e9sfeldolgoz\u00e1sra a Rust nyelven \u00edrt <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/tokio-rs\/tokio\">Tokio<\/a><\/noindex>, amely lehet\u0151v\u00e9 teszi az esem\u00e9nyalap\u00fa architekt\u00far\u00e1ra \u00e9p\u00fcl\u0151, magas teljes\u00edtm\u00e9ny\u0171 alkalmaz\u00e1sok l\u00e9trehoz\u00e1s\u00e1t, amelyek t\u00e1mogatj\u00e1k a t\u00f6bb sz\u00e1las feldolgoz\u00e1st \u00e9s az aszinkron h\u00e1l\u00f3zati k\u00e9r\u00e9skezel\u00e9st.<\/p>\n<p>F\u0151 <noindex><a rel=\"nofollow\" href=\"https:\/\/deno.land\/manual\">jellemz\u0151i<\/a><\/noindex> Deno:\n<\/p>\n<ul>\n<li class=\"l\"> Az alap\u00e9rtelmezett konfigur\u00e1ci\u00f3 biztons\u00e1gorient\u00e1lt. A f\u00e1jlokkal val\u00f3 kapcsolatok, a h\u00e1l\u00f3zati lehet\u0151s\u00e9gek \u00e9s az alap\u00e9rtelmezett k\u00f6rnyezeti v\u00e1ltoz\u00f3khoz val\u00f3 hozz\u00e1f\u00e9r\u00e9s blokkolva van, \u00e9s kifejezett enged\u00e9lyez\u00e9st ig\u00e9nyel. Az alap\u00e9rtelmezett alkalmaz\u00e1sok izol\u00e1lt sandbox k\u00f6rnyezetben futnak, \u00e9s nem f\u00e9rhetnek hozz\u00e1 a rendszer funkci\u00f3ihoz kifejezett jogosults\u00e1gok biztos\u00edt\u00e1sa n\u00e9lk\u00fcl;\n<\/li>\n<li class=\"l\"> A JavaScript mellett be\u00e9p\u00edtett TypeScript t\u00e1mogat\u00e1s. A t\u00edpusok ellen\u0151rz\u00e9s\u00e9re \u00e9s JavaScript gener\u00e1l\u00e1s\u00e1ra a TypeScript be\u00e9p\u00edtett ford\u00edt\u00f3j\u00e1t haszn\u00e1lja, ami teljes\u00edtm\u00e9nycs\u00f6kken\u00e9st eredm\u00e9nyez a JavaScript V8-as elemz\u00e9s\u00e9vel szemben. A j\u00f6v\u0151ben egy saj\u00e1t TypeScript t\u00edpusellen\u0151rz\u0151 rendszer tervez\u00e9se van, amely jelent\u0151sen jav\u00edtja a TypeScript feldolgoz\u00e1si teljes\u00edtm\u00e9ny\u00e9t;\n<\/li>\n<li class=\"l\"> A Deno futtathat\u00f3 egy \u00f6n\u00e1ll\u00f3 v\u00e9grehajthat\u00f3 f\u00e1jl form\u00e1j\u00e1ban (&#171;deno&#187;). Alkalmaz\u00e1sok futtat\u00e1s\u00e1hoz a Deno seg\u00edts\u00e9g\u00e9vel elegend\u0151 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/denoland\/deno\/releases\">let\u00f6lthet\u0151.<\/a><\/noindex> a platformj\u00e1n egy v\u00e9grehajthat\u00f3 f\u00e1jlt, k\u00f6r\u00fclbel\u00fcl 20 MB m\u00e9retben, k\u00fcls\u0151 f\u00fcgg\u0151s\u00e9gek n\u00e9lk\u00fcl, \u00e9s nem ig\u00e9nyel k\u00fcl\u00f6n\u00f6sebb telep\u00edt\u00e9st a rendszerbe. Megjegyzend\u0151, hogy a deno nem egy monolitikus alkalmaz\u00e1s, hanem Rust on crate-csomagok gy\u0171jtem\u00e9nye (<noindex><a rel=\"nofollow\" href=\"https:\/\/crates.io\/crates\/deno_core\">deno_core<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/crates.io\/crates\/rusty_v8\">rusty_v8<\/a><\/noindex>), amelyeket k\u00fcl\u00f6n-k\u00fcl\u00f6n is haszn\u00e1lhatunk;\n<\/li>\n<li class=\"l\"> A program launch and module loading can utilize URL addressing. For example, to run the program welcome.js, the command can be used: \"deno https:\/\/deno.land\/std\/examples\/welcome.js\". Code from external resources is downloaded and cached on the local system, but is never updated automatically (to update, the application must be explicitly launched with the flag \"--reload\");\n<\/li>\n<li class=\"l\"> Hat\u00e9kony HTTP h\u00e1l\u00f3zati k\u00e9r\u00e9sek kezel\u00e9se az alkalmaz\u00e1sokban, a platform a nagy teljes\u00edtm\u00e9ny\u0171 h\u00e1l\u00f3zati alkalmaz\u00e1sok k\u00e9sz\u00edt\u00e9s\u00e9re lett tervezve;\n<\/li>\n<li class=\"l\"> Lehet\u0151s\u00e9g univerz\u00e1lis webalkalmaz\u00e1sok l\u00e9trehoz\u00e1s\u00e1ra, amelyek Deno-ban \u00e9s a hagyom\u00e1nyos webb\u00f6ng\u00e9sz\u0151ben is futtathat\u00f3k;\n<li class=\"l\"> A <noindex><a rel=\"nofollow\" href=\"https:\/\/deno.land\/std\">alap\u00e9rtelmezett modulgy\u0171jtem\u00e9ny<\/a><\/noindex>, amelyek felhaszn\u00e1l\u00e1sa nem ig\u00e9nyel kapcsol\u00f3d\u00e1st k\u00fcls\u0151 f\u00fcgg\u0151s\u00e9gekhez. A standard gy\u0171jtem\u00e9ny moduljai tov\u00e1bbi ellen\u0151rz\u00e9sen \u00e9s kompatibilit\u00e1sellen\u0151rz\u00e9sen estek \u00e1t;\n<\/li>\n<li class=\"l\"> A runtime-on k\u00edv\u00fcl a Deno platform csomagkezel\u0151k\u00e9nt is m\u0171k\u00f6dik, \u00e9s lehet\u0151v\u00e9 teszi, hogy a k\u00f3dban URL-en kereszt\u00fcl hivatkozzunk modulokra. P\u00e9ld\u00e1ul egy modul bet\u00f6lt\u00e9s\u00e9hez a k\u00f3dban a &#171;import * as log from &#171;https:\/\/deno.land\/std\/log\/mod.ts&#187; utas\u00edt\u00e1st adhatjuk meg. A k\u00fcls\u0151 szerverekr\u0151l URL-en kereszt\u00fcl bet\u00f6lt\u00f6tt f\u00e1jlok cache-len ki vannak mentve. A modulok verzi\u00f3khoz val\u00f3 k\u00f6t\u00e9s\u00e9t a verzi\u00f3sz\u00e1mok URL-en bel\u00fcli megad\u00e1s\u00e1val hat\u00e1rozz\u00e1k meg, p\u00e9ld\u00e1ul &#171;https:\/\/unpkg.com\/liltest@0.0.5\/dist\/liltest.js&#187;;\n<\/li>\n<li class=\"l\"> The system includes a dependency inspection feature (the command \"deno info\") and a code formatting utility (deno fmt);\n<\/li>\n<li class=\"l\"> All application scripts can be combined into a single JavaScript file.\n<\/li>\n<\/ul>\n<p> Differences from Node.js:\n<\/p>\n<ul>\n<li class=\"l\"> Deno does not use the npm package manager<br \/>\n and does not rely on repositories; module addressing is done via URL or file paths, and modules can be hosted on any site;\n<\/li>\n<li class=\"l\"> A Deno nem haszn\u00e1l &#171;package.json&#187; f\u00e1jlt a modulok meghat\u00e1roz\u00e1s\u00e1hoz;\n<\/li>\n<li class=\"l\"> Different API: all asynchronous actions in Deno return a promise;\n<\/li>\n<li class=\"l\"> Deno requires explicit definition of all necessary permissions for files, network, and environment variables;\n<\/li>\n<li class=\"l\"> All unhandled errors lead to the termination of the application;\n<\/li>\n<li class=\"l\"> Deno implements the ECMAScript module system and does not support require();\n<li class=\"l\"> The built-in HTTP server in Deno is written in TypeScript and operates over native TCP sockets, while the Node.js HTTP server is written in C and provides bindings for JavaScript. Deno developers focused on optimizing the entire layer of TCP sockets and providing a more general interface. The Deno HTTP server ensures lower throughput but guarantees predictable low latency. For example, in a test, a simple application based on the Deno HTTP server was able to handle 25,000 requests per second with a maximum latency of 1.3 milliseconds. In Node.js, a similar application handled 34,000 requests per second, but latencies ranged from 2 to 300 milliseconds.\n<li class=\"l\"> Deno is not compatible with packages for Node.js (NPM), but is developing separately <noindex><a rel=\"nofollow\" href=\"https:\/\/deno.land\/std\/node\/\">a layer<\/a><\/noindex> for compatibility with the Node.js standard library, allowing more applications written for Node.js to run on Deno as it evolves.\n<\/li>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52947\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0434\u0432\u0443\u0445 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a Deno 1.0, \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0434\u043b\u044f \u043e\u0431\u043e\u0441\u043e\u0431\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u044f\u0437\u044b\u043a\u0430\u0445 JavaScript \u0438 TypeScript, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0445 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435. \u041f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0443 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442 \u0420\u0430\u0439\u0430\u043d \u0414\u0430\u043b\u044c (Ryan Dahl), \u0441\u043e\u0437\u0434\u0430\u0442\u0435\u043b\u044c Node.js. \u041a\u0430\u043a \u0438 \u0432 Node.js \u0432 Deno \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f JavaScript-\u0434\u0432\u0438\u0436\u043e\u043a V8, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 Chromium. [&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-81559","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=\"\u041f\u043e\u0441\u043b\u0435 \u0434\u0432\u0443\u0445 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a Deno 1.0.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link 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