{"id":3291,"date":"2023-04-26T12:52:06","date_gmt":"2023-04-26T09:52:06","guid":{"rendered":"https:\/\/blog.koddit.com\/?p=3291"},"modified":"2023-04-26T13:02:52","modified_gmt":"2023-04-26T10:02:52","slug":"express-js-nedir","status":"publish","type":"post","link":"https:\/\/blog.koddit.com\/en\/yazilim\/express-js-nedir\/","title":{"rendered":"Express JS Nedir?"},"content":{"rendered":"<p><a href=\"https:\/\/expressjs.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Express.js<\/a>, Node.js i\u00e7in hafif ve esnek bir web uygulama <a href=\"https:\/\/blog.koddit.com\/en\/yazilim\/php-framework-nedir-hangi-frameworku-kullanmaliyim\/\" target=\"_blank\" rel=\"noreferrer noopener\">framework&#8217;\u00fcd\u00fcr<\/a>. Node.js ile birlikte kullan\u0131ld\u0131\u011f\u0131nda, h\u0131zl\u0131 ve \u00f6l\u00e7eklenebilir bir \u015fekilde web uygulamalar\u0131 ve API&#8217;ler geli\u015ftirmek i\u00e7in kullan\u0131labilir. Express.js, RESTful API&#8217;ler, tek sayfa uygulamalar\u0131 (SPA) ve di\u011fer web uygulamalar\u0131 i\u00e7in idealdir. Bu yaz\u0131da, Express.js nedir, ne i\u015fe yarar ve nas\u0131l kullan\u0131l\u0131r gibi konulara detayl\u0131 bir \u015fekilde de\u011finece\u011fiz.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/blog.koddit.com\/wp-content\/plugins\/wp-images-lazy-loading\/images\/grey.gif\" data-original=\"https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/image-5-1024x448.png\" alt=\"express js nedir\" class=\"lazy wp-image-3293\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"448\" src=\"https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/image-5-1024x448.png\" alt=\"express js nedir\" class=\"wp-image-3293\" srcset=\"https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/image-5-1024x448.png 1024w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/image-5-300x131.png 300w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/image-5-768x336.png 768w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/image-5-798x350.png 798w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/image-5.png 1400w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Express.js Nedir?<\/h2>\n\n\n\n<p>Express.js, <strong>Node.js tabanl\u0131 <\/strong>bir web uygulama framework&#8217;\u00fcd\u00fcr. Node.js, h\u0131zl\u0131 ve verimli bir \u015fekilde web sunucular\u0131 olu\u015fturmak i\u00e7in tasarlanm\u0131\u015f bir platformdur. Express.js, Node.js&#8217;ye bir katman ekleyerek, web uygulamalar\u0131 geli\u015ftiricilerine daha fazla esneklik ve \u00f6zelle\u015ftirme se\u00e7ene\u011fi sunar.<\/p>\n\n\n\n<p>Express.js, minimalist bir yakla\u015f\u0131ma sahip olan bir framework olarak bilinir. Bu, geli\u015ftiricilere ihtiya\u00e7lar\u0131na g\u00f6re uygulama olu\u015fturmak i\u00e7in ihtiya\u00e7 duyduklar\u0131 bile\u015fenleri se\u00e7me \u00f6zg\u00fcrl\u00fc\u011f\u00fc verir. Ayr\u0131ca bu \u00f6zelle\u015ftirme se\u00e7ene\u011fi, Express.js&#8217;in di\u011fer web uygulama framework&#8217;lerine g\u00f6re daha hafif olmas\u0131n\u0131 sa\u011flar.<\/p>\n\n\n\n<p>Express.js, web uygulamalar\u0131n\u0131n olu\u015fturulmas\u0131n\u0131 ve y\u00f6netilmesini kolayla\u015ft\u0131ran bir\u00e7ok \u00f6zellik sunar. \u00d6zellikle, HTTP istekleri ve yan\u0131tlar\u0131, y\u00f6nlendirme, middleware, \u015fablon motorlar\u0131, veritaban\u0131 ba\u011flant\u0131lar\u0131 gibi konularda geli\u015ftiricilere kolayl\u0131k sa\u011flar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Express.js Ne \u0130\u015fe Yarar?<\/h2>\n\n\n\n<p>Express.js, web uygulamalar\u0131n\u0131n geli\u015ftirilmesinde bir\u00e7ok fayda sa\u011flar. \u0130\u015fte, Express.js&#8217;in sa\u011flad\u0131\u011f\u0131 ba\u015fl\u0131ca faydalar:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u0131z ve Performans<\/h3>\n\n\n\n<p>Express.js, Node.js&#8217;in h\u0131zl\u0131 ve verimli yap\u0131s\u0131ndan faydalanarak web uygulamalar\u0131n\u0131n h\u0131zl\u0131 bir \u015fekilde olu\u015fturulmas\u0131n\u0131 ve sunulmas\u0131n\u0131 sa\u011flar. Bu, web uygulamalar\u0131n\u0131n daha h\u0131zl\u0131 \u00e7al\u0131\u015fmas\u0131n\u0131 ve daha iyi performans g\u00f6stermesini sa\u011flar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Esneklik ve \u00d6zelle\u015ftirme<\/h3>\n\n\n\n<p>Express.js, minimalist yap\u0131s\u0131 sayesinde, geli\u015ftiricilere ihtiya\u00e7lar\u0131na g\u00f6re uygulama olu\u015fturma \u00f6zg\u00fcrl\u00fc\u011f\u00fc verir. Bu \u00f6zelle\u015ftirme se\u00e7ene\u011fi, geli\u015ftiricilerin web uygulamalar\u0131n\u0131n \u00f6zelliklerini ve i\u015flevselli\u011fini tam olarak kontrol etmelerini sa\u011flar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">RESTful API&#8217;ler<\/h3>\n\n\n\n<p>Express.js, RESTful API&#8217;lerin olu\u015fturulmas\u0131n\u0131 kolayla\u015ft\u0131r\u0131r. REST (Representational State Transfer), web servislerinin tasar\u0131m\u0131 ve uygulanmas\u0131nda kullan\u0131lan bir yakla\u015f\u0131md\u0131r. Express.js, RESTful API&#8217;lerin tasar\u0131m\u0131n\u0131 ve uygulanmas\u0131n\u0131 kolayla\u015ft\u0131r\u0131r ve bu sayede geli\u015ftiricilerin web uygulamalar\u0131n\u0131n daha iyi \u00f6l\u00e7eklenebilir olmas\u0131n\u0131 sa\u011flar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Tek Sayfa Uygulamalar\u0131 (SPA)<\/h3>\n\n\n\n<p>Express.js, tek sayfa uygulamalar\u0131n\u0131n olu\u015fturulmas\u0131n\u0131 kolayla\u015ft\u0131r\u0131r. Tek sayfa uygulamalar\u0131, kullan\u0131c\u0131lar\u0131n sayfalar aras\u0131nda ge\u00e7i\u015f yapmak yerine, tek bir sayfada uygulama i\u015flevselli\u011fini sunan uygulamalard\u0131r ve bu sayede geli\u015ftiricilerin kullan\u0131c\u0131 deneyimini geli\u015ftirmesine yard\u0131mc\u0131 olur.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.koddit.com\/wp-content\/plugins\/wp-images-lazy-loading\/images\/grey.gif\" data-original=\"http:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/w7zyugynprq-1024x768.jpg\" alt=\"express js nedir\" class=\"lazy wp-image-3294\" width=\"585\" height=\"439\"\/><noscript><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/w7zyugynprq-1024x768.jpg\" alt=\"express js nedir\" class=\"wp-image-3294\" width=\"585\" height=\"439\" srcset=\"https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/w7zyugynprq-1024x768.jpg 1024w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/w7zyugynprq-300x225.jpg 300w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/w7zyugynprq-768x576.jpg 768w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/w7zyugynprq-1536x1152.jpg 1536w, https:\/\/blog.koddit.com\/wp-content\/uploads\/2023\/04\/w7zyugynprq.jpg 1600w\" sizes=\"(max-width: 585px) 100vw, 585px\" \/><\/noscript><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Express.js Nas\u0131l Kullan\u0131l\u0131r?<\/h2>\n\n\n\n<p>Express.js, Node.js tabanl\u0131 bir \u00e7at\u0131 oldu\u011fu i\u00e7in, \u00f6ncelikle Node.js&#8217;in y\u00fckl\u00fc olmas\u0131 gerekiyor. Node.js&#8217;in y\u00fckl\u00fc oldu\u011funu varsayarak, Express.js kurulumu i\u00e7in \u015fu ad\u0131mlar\u0131 takip edebilirsiniz:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ad\u0131m 1: Proje Klas\u00f6r\u00fc Olu\u015fturma<\/h3>\n\n\n\n<p>\u00d6ncelikle, Express.js uygulaman\u0131z i\u00e7in bir proje klas\u00f6r\u00fc olu\u015fturman\u0131z gerekiyor. Bu, uygulaman\u0131z\u0131n dosya ve klas\u00f6rlerini d\u00fczenli tutman\u0131z\u0131 sa\u011flar. Proje klas\u00f6r\u00fcn\u00fc Terminal veya Komut \u0130stemi \u00fczerinden olu\u015fturabilirsiniz.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>$ mkdir my-express-app\n$ cd my-express-app\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Ad\u0131m 2: Express.js Kurulumu<\/h3>\n\n\n\n<p>Express.js kurulumu i\u00e7in, NPM (Node Package Manager) kullanabilirsiniz. NPM, Node.js i\u00e7in bir paket y\u00f6neticisidir ve Express.js gibi framework&#8217;lerin kurulumunu kolayla\u015ft\u0131r\u0131r.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>$ npm install express --save\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Ad\u0131m 3: Uygulama Olu\u015fturma<\/h3>\n\n\n\n<p>Express.js uygulaman\u0131z\u0131 olu\u015fturmak i\u00e7in, <code>app.js<\/code> veya <code>index.js<\/code> gibi bir dosya olu\u015fturman\u0131z gerekiyor. Bu dosya, uygulaman\u0131z\u0131n ana giri\u015f noktas\u0131d\u0131r ve uygulaman\u0131z\u0131n ana kodunu i\u00e7erir.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>const express = require('express');\nconst app = express();\n\napp.get('\/', function(req, res) {\n  res.send('Merhaba D\u00fcnya!');\n});\n\napp.listen(3000, function() {\n  console.log('Uygulama 3000 portunda \u00e7al\u0131\u015f\u0131yor...');\n});\n<\/code><\/pre>\n\n\n\n<p>Bu kod, bir HTTP GET iste\u011fi geldi\u011finde &#8220;Merhaba D\u00fcnya!&#8221; metnini d\u00f6nd\u00fcren basit bir Express.js uygulamas\u0131d\u0131r. <code>app.get()<\/code> fonksiyonu, HTTP GET isteklerini dinleyen bir router olu\u015fturur. \u0130lk parametre olarak &#8220;\/&#8221; (k\u00f6k) route&#8217;u belirtir, ikinci parametre olarak ise, bir fonksiyon al\u0131r. Bu fonksiyon, gelen iste\u011fi ve yan\u0131t\u0131 al\u0131r ve yan\u0131t olarak &#8220;Merhaba D\u00fcnya!&#8221; metnini g\u00f6nderir. <code>app.listen()<\/code> fonksiyonu, uygulaman\u0131n belirtilen port&#8217;ta dinlemeye ba\u015flad\u0131\u011f\u0131n\u0131 s\u00f6yler.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ad\u0131m 4: Uygulaman\u0131n Ba\u015flat\u0131lmas\u0131<\/h3>\n\n\n\n<p>Express.js uygulaman\u0131z\u0131 ba\u015flatmak i\u00e7in, Terminal veya Komut \u0130stemi \u00fczerinden, a\u015fa\u011f\u0131daki komutu kullanabilirsiniz:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>$ node app.js\n<\/code><\/pre>\n\n\n\n<p>Bu komut, uygulaman\u0131z\u0131 3000 portunda \u00e7al\u0131\u015ft\u0131racakt\u0131r. Taray\u0131c\u0131n\u0131zda <code>http:\/\/localhost:3000<\/code> adresine giderek, &#8220;Merhaba D\u00fcnya!&#8221; metnini g\u00f6rebilirsiniz.<\/p>\n\n\n\n<p>Express.js, Node.js tabanl\u0131 bir web uygulama framewok&#8217;\u00fc oldu\u011fundan Node.js&#8217;in sa\u011flad\u0131\u011f\u0131 t\u00fcm avantajlar\u0131 ve dezavantajlar\u0131 sa\u011flamakta. Ek olarak, Node.js hakk\u0131nda bilgi edinmek i\u00e7in yaz\u0131m\u0131za g\u00f6z atabilirsiniz: <a href=\"https:\/\/blog.koddit.com\/en\/yazilim\/node-js-nedir-ne-ise-yarar\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/blog.koddit.com\/yazilim\/node-js-nedir-ne-ise-yarar\/<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Express.js, Node.js i\u00e7in hafif ve esnek bir web uygulama framework&#8217;\u00fcd\u00fcr. Node.js ile birlikte kullan\u0131ld\u0131\u011f\u0131nda, h\u0131zl\u0131 ve \u00f6l\u00e7eklenebilir bir \u015fekilde web uygulamalar\u0131 ve API&#8217;ler geli\u015ftirmek i\u00e7in kullan\u0131labilir. Express.js, RESTful API&#8217;ler, tek sayfa uygulamalar\u0131 (SPA) ve di\u011fer web uygulamalar\u0131 i\u00e7in idealdir. Bu yaz\u0131da, Express.js nedir, ne i\u015fe yarar ve nas\u0131l kullan\u0131l\u0131r gibi konulara detayl\u0131 bir \u015fekilde de\u011finece\u011fiz. [&hellip;]<\/p>","protected":false},"author":1,"featured_media":3293,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[168],"tags":[],"class_list":["post-3291","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-yazilim"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Express JS Nedir? - Koddit<\/title>\n<meta name=\"description\" content=\"Express JS Nedir? Ne i\u015fe yarar ve nerelerde kullan\u0131l\u0131r? 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