{"id":12950,"date":"2025-02-19T20:00:15","date_gmt":"2025-02-19T17:00:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/reactte-useeffecti-yanlis-kullanmayi-birakin\/"},"modified":"2025-02-19T20:00:15","modified_gmt":"2025-02-19T17:00:15","slug":"reactte-useeffecti-yanlis-kullanmayi-birakin","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/reactte-useeffecti-yanlis-kullanmayi-birakin\/","title":{"rendered":"React&#8217;te useEffect&#8217;i Yanl\u0131\u015f Kullanmay\u0131 B\u0131rak\u0131n!"},"content":{"rendered":"<p>React&#8217;te useEffect&#8217;i Yanl\u0131\u015f Kullanmay\u0131 B\u0131rak\u0131n!<\/p>\n<p>Merhaba, ben Fatih Soysal.  React geli\u015ftiricileri olarak s\u0131kl\u0131kla kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve yanl\u0131\u015f kullan\u0131mlarla performans sorunlar\u0131na yol a\u00e7abilen bir React hook&#8217;undan bahsedece\u011fiz: <code>useEffect<\/code>.  Bu makalede,  <code>useEffect<\/code>&#8216;i do\u011fru ve etkili bir \u015fekilde nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131, yayg\u0131n hatalardan nas\u0131l ka\u00e7\u0131naca\u011f\u0131n\u0131z\u0131 ve performans\u0131 nas\u0131l optimize edece\u011finizi detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z.  Umar\u0131m bu bilgiler, projelerinizde daha temiz ve verimli kod yazman\u0131za yard\u0131mc\u0131 olur.<\/p>\n<h2>useEffect Nedir ve Ne \u0130\u015fe Yarar?<\/h2>\n<p><code>useEffect<\/code>, React bile\u015fenlerinin yan etkilerini (side effects) y\u00f6netmek i\u00e7in kullan\u0131lan bir hook&#8217;tur.  Yan etkiler, bir bile\u015fenin render i\u015fleminin d\u0131\u015f\u0131nda ger\u00e7ekle\u015fen i\u015flemlerdir; \u00f6rne\u011fin, a\u011f istekleri, veri g\u00fcncellemeleri, zamanlay\u0131c\u0131lar veya DOM manip\u00fclasyonlar\u0131 gibi.  <code>useEffect<\/code>, bu yan etkileri kontrol alt\u0131nda tutarak, bile\u015feninizin temiz ve d\u00fczenli kalmas\u0131n\u0131 sa\u011flar.  \u00d6rne\u011fin, bir bile\u015fen ilk render edildi\u011finde veri \u00e7ekmek veya bir bile\u015fen g\u00fcncellendi\u011finde DOM&#8217;u de\u011fi\u015ftirmek i\u00e7in <code>useEffect<\/code> kullanabilirsiniz.<\/p>\n<h2>Yayg\u0131n useEffect Yanl\u0131\u015f Kullan\u0131mlar\u0131<\/h2>\n<p>Maalesef, <code>useEffect<\/code>&#8216;in g\u00fcc\u00fc, yanl\u0131\u015f kullan\u0131mda performans sorunlar\u0131na ve hata risklerine yol a\u00e7abilir.  \u0130\u015fte en s\u0131k yap\u0131lan hatalardan baz\u0131lar\u0131:<\/p>\n<ul>\n<li><strong> gereksiz ba\u011f\u0131ml\u0131l\u0131k dizileri:<\/strong> <code>useEffect<\/code>&#8216;in ikinci arg\u00fcman\u0131 olan ba\u011f\u0131ml\u0131l\u0131k dizisi, hook&#8217;un ne zaman \u00e7al\u0131\u015faca\u011f\u0131n\u0131 belirler. Gereksiz ba\u011f\u0131ml\u0131l\u0131klar eklemek, bile\u015fenin gereksiz yere tekrar render edilmesine ve performans sorunlar\u0131na yol a\u00e7abilir. \u00d6rne\u011fin, bir sayac\u0131n de\u011ferini g\u00fcncellemek i\u00e7in bir <code>useEffect<\/code> kullan\u0131yorsan\u0131z ve ba\u011f\u0131ml\u0131l\u0131k dizisine gereksiz de\u011fi\u015fkenler ekliyorsan\u0131z, sayac\u0131n de\u011feri de\u011fi\u015fmese bile <code>useEffect<\/code> \u00e7al\u0131\u015facakt\u0131r. Bu durumu \u00f6nlemek i\u00e7in, ba\u011f\u0131ml\u0131l\u0131k dizisine sadece ger\u00e7ekten gerekli olan de\u011fi\u015fkenleri eklemeliyiz.<\/li>\n<li><strong>Bo\u015f ba\u011f\u0131ml\u0131l\u0131k dizisi hatas\u0131:<\/strong> Bo\u015f bir ba\u011f\u0131ml\u0131l\u0131k dizisi (<code>[]<\/code>), <code>useEffect<\/code>&#8216;in yaln\u0131zca bile\u015fenin ilk render edildi\u011finde \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar. Ancak, bu durumun bile\u015fenin ya\u015fam d\u00f6ng\u00fcs\u00fc boyunca her zaman istenen davran\u0131\u015f olmad\u0131\u011f\u0131n\u0131 unutmamak gerekir. Bir bile\u015fenin her render&#8217;\u0131nda bir yan etki ger\u00e7ekle\u015ftirmek istiyorsan\u0131z, ba\u011f\u0131ml\u0131l\u0131k dizisine en az bir de\u011fi\u015fken eklemelisiniz.<\/li>\n<li><strong>Temizlik fonksiyonunun unutulmas\u0131:<\/strong>  <code>useEffect<\/code>, temizlik fonksiyonu olarak adland\u0131r\u0131lan bir fonksiyon d\u00f6nd\u00fcrmenize olanak tan\u0131r. Bu fonksiyon, bile\u015fen unmount edilmeden \u00f6nce veya bir sonraki <code>useEffect<\/code> \u00e7al\u0131\u015ft\u0131r\u0131lmadan \u00f6nce \u00e7al\u0131\u015ft\u0131r\u0131l\u0131r.  \u00d6rne\u011fin, bir a\u011f iste\u011fini iptal etmek veya bir zamanlay\u0131c\u0131y\u0131 durdurmak i\u00e7in temizlik fonksiyonu kullanmal\u0131s\u0131n\u0131z.  Bu fonksiyonu unutmak, bellek s\u0131z\u0131nt\u0131lar\u0131na ve beklenmedik davran\u0131\u015flara yol a\u00e7abilir. <\/li>\n<\/ul>\n<h2>useEffect&#8217;i Do\u011fru Kullanmak \u0130\u00e7in \u0130pu\u00e7lar\u0131<\/h2>\n<p><code>useEffect<\/code>&#8216;i do\u011fru ve etkili bir \u015fekilde kullanmak i\u00e7in a\u015fa\u011f\u0131daki ipu\u00e7lar\u0131n\u0131 takip edebilirsiniz:<\/p>\n<ul>\n<li><strong>Ba\u011f\u0131ml\u0131l\u0131k dizisini dikkatlice olu\u015fturun:<\/strong> Sadece ger\u00e7ekten gerekli olan de\u011fi\u015fkenleri ba\u011f\u0131ml\u0131l\u0131k dizisine ekleyin.<\/li>\n<li><strong>Temizlik fonksiyonunu kullan\u0131n:<\/strong>  \u00d6zellikle a\u011f istekleri, zamanlay\u0131c\u0131lar veya abonelikler gibi kaynaklar\u0131 temizlemek i\u00e7in temizlik fonksiyonunu mutlaka kullan\u0131n.<\/li>\n<li><strong>Karma\u015f\u0131k mant\u0131\u011f\u0131 daha k\u00fc\u00e7\u00fck, daha y\u00f6netilebilir <code>useEffect<\/code> hook&#8217;lar\u0131na ay\u0131r\u0131n:<\/strong>  B\u00fcy\u00fck ve karma\u015f\u0131k <code>useEffect<\/code> hook&#8217;lar\u0131 yerine, daha k\u00fc\u00e7\u00fck ve daha odakl\u0131 hook&#8217;lar kullanmak daha kolay anla\u015f\u0131l\u0131r ve bak\u0131m\u0131 daha kolay kod yazman\u0131za yard\u0131mc\u0131 olacakt\u0131r.<\/li>\n<li><strong><code>useCallback<\/code> ve <code>useMemo<\/code> hook&#8217;lar\u0131n\u0131 kullan\u0131n:<\/strong>  Gereksiz render&#8217;lar\u0131 \u00f6nlemek ve performans\u0131 art\u0131rmak i\u00e7in <code>useCallback<\/code> ve <code>useMemo<\/code> hook&#8217;lar\u0131n\u0131 <code>useEffect<\/code> ile birlikte kullan\u0131n.<\/li>\n<\/ul>\n<h2>\u00d6rnek Kodlar<\/h2>\n<p>\u0130\u015fte <code>useEffect<\/code>&#8216;in do\u011fru ve yanl\u0131\u015f kullan\u0131mlar\u0131n\u0131 g\u00f6steren birka\u00e7 \u00f6rnek:<\/p>\n<h3>Yanl\u0131\u015f Kullan\u0131m (Gereksiz Render):<\/h3>\n<pre><code>\n{\nimport React, { useState, useEffect } from 'react';\n\nfunction MyComponent() {\n  const [count, setCount] = useState(0);\n  const [name, setName] = useState('Fatih');\n\n  useEffect(() => {\n    console.log('Count updated:', count);\n    \/\/ Gereksiz renderlara sebep olan bir yan etki\n  }, [count, name]); \/\/ name de\u011fi\u015fkeni gereksiz\n\n  return (\n    <div>\n      <p>Count: {count}<\/p>\n      <button onClick={() => setCount(count + 1)}>Increment<\/button>\n    <\/div>\n  );\n}\n}\n<\/code><\/pre>\n<h3>Do\u011fru Kullan\u0131m:<\/h3>\n<pre><code>\n{\nimport React, { useState, useEffect } from 'react';\n\nfunction MyComponent() {\n  const [count, setCount] = useState(0);\n\n  useEffect(() => {\n    console.log('Count updated:', count);\n    \/\/ Sadece count de\u011fi\u015fti\u011finde \u00e7al\u0131\u015f\u0131r\n    return () => {\n      \/\/ Temizleme i\u015flemleri burada yap\u0131labilir\n    };\n  }, [count]);\n\n  return (\n    <div>\n      <p>Count: {count}<\/p>\n      <button onClick={() => setCount(count + 1)}>Increment<\/button>\n    <\/div>\n  );\n}\n}\n<\/code><\/pre>\n<p>Daha fazla React \u00f6\u011frenmek i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.<\/p>\n<p>Faydal\u0131 bulabilece\u011finiz bir ba\u015fka kaynak da \u015fudur: <a href=\"https:\/\/dev.to\/joodi\/stop-misusing-useeffect-in-react-1g5o\">https:\/\/dev.to\/joodi\/stop-misusing-useeffect-in-react-1g5o<\/a><\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Umar\u0131m bu makale,  <code>useEffect<\/code> hook&#8217;unu daha etkili bir \u015fekilde kullanman\u0131za yard\u0131mc\u0131 olmu\u015ftur.  Do\u011fru kullan\u0131m ile React uygulamalar\u0131n\u0131z\u0131n performans\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir ve kodunuzun daha okunabilir ve bak\u0131m\u0131 daha kolay hale getirebilirsiniz.  Unutmay\u0131n ki,  <code>useEffect<\/code> g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r ancak do\u011fru \u015fekilde kullan\u0131lmad\u0131\u011f\u0131nda sorunlara yol a\u00e7abilir.  Dikkatli kullan\u0131m ve temiz kod yazma al\u0131\u015fkanl\u0131klar\u0131 ile React uygulamalar\u0131n\u0131z\u0131n ba\u015far\u0131s\u0131n\u0131 garanti alt\u0131na alabilirsiniz.<\/p>\n<p>#Etiketler: React, useEffect, hook, yan etkiler, performans, optimizasyon, temizlik fonksiyonu, ba\u011f\u0131ml\u0131l\u0131k dizisi, React hooklar\u0131,  JavaScript,  web geli\u015ftirme<\/p>\n","protected":false},"excerpt":{"rendered":"React&#8217;te useEffect&#8217;i Yanl\u0131\u015f Kullanmay\u0131 B\u0131rak\u0131n! Merhaba, ben Fatih Soysal. React geli\u015ftiricileri olarak s\u0131kl\u0131kla kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve yanl\u0131\u015f kullan\u0131mlarla performans&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-12950","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>React&#039;te useEffect&#039;i Yanl\u0131\u015f Kullanmay\u0131 B\u0131rak\u0131n!<\/title>\n<meta name=\"description\" content=\"Merhaba, ben Fatih Soysal. React geli\u015ftiricileri olarak s\u0131kl\u0131kla kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve yanl\u0131\u015f kullan\u0131mlarla performans sorunlar\u0131na yol a\u00e7abilen bir React hook&#039;undan bahsedece\u011fiz: useEffect. Bu makalede, useEffect&#039;i do\u011fru ve etkili bir \u015fekilde nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131, yayg\u0131n hatalardan nas\u0131l ka\u00e7\u0131naca\u011f\u0131n\u0131z\u0131 ve performans\u0131 nas\u0131l optimize edece\u011finizi detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z. Umar\u0131m bu bilgiler, projelerinizde daha temiz ve verimli kod yazman\u0131za yard\u0131mc\u0131 olur.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/reactte-useeffecti-yanlis-kullanmayi-birakin\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"React&#039;te useEffect&#039;i Yanl\u0131\u015f Kullanmay\u0131 B\u0131rak\u0131n!\" \/>\n<meta property=\"og:description\" content=\"Merhaba, ben Fatih Soysal. React geli\u015ftiricileri olarak s\u0131kl\u0131kla kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z ve yanl\u0131\u015f kullan\u0131mlarla performans sorunlar\u0131na yol a\u00e7abilen bir React hook&#039;undan bahsedece\u011fiz: useEffect. Bu makalede, useEffect&#039;i do\u011fru ve etkili bir \u015fekilde nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131, yayg\u0131n hatalardan nas\u0131l ka\u00e7\u0131naca\u011f\u0131n\u0131z\u0131 ve performans\u0131 nas\u0131l optimize edece\u011finizi detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z. 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