{"id":22287,"date":"2025-05-27T09:15:15","date_gmt":"2025-05-27T06:15:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/reactte-usecallback-fonksiyon-bellekleme-ve-yeniden-olusturma-onleme\/"},"modified":"2025-05-27T09:15:15","modified_gmt":"2025-05-27T06:15:15","slug":"reactte-usecallback-fonksiyon-bellekleme-ve-yeniden-olusturma-onleme","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/reactte-usecallback-fonksiyon-bellekleme-ve-yeniden-olusturma-onleme\/","title":{"rendered":"React&#8217;te useCallback: Fonksiyon Bellekleme ve Yeniden Olu\u015fturma \u00d6nleme"},"content":{"rendered":"<p><body><\/p>\n<p>React&#8217;te useCallback: Fonksiyon Bellekleme ve Yeniden Olu\u015fturma \u00d6nleme<\/p>\n<p>React uygulamalar\u0131nda performans optimizasyonu son derece \u00f6nemlidir.  \u00d6zellikle karma\u015f\u0131k uygulamalarda, bile\u015fenlerin gereksiz yere yeniden renderlanmas\u0131 performans sorunlar\u0131na yol a\u00e7abilir.  Bu noktada React&#8217;in sundu\u011fu <code>useCallback<\/code> hook&#8217;u devreye girer.  <code>useCallback<\/code>, fonksiyonlar\u0131 belle\u011fe alarak (memoize ederek), gereksiz yeniden olu\u015fturulmalar\u0131n\u0131 engeller ve uygulaman\u0131z\u0131n daha verimli \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar.<\/p>\n<p>Peki, <code>useCallback<\/code> tam olarak ne yapar?  Basit\u00e7e s\u00f6ylemek gerekirse, <code>useCallback<\/code>, bir fonksiyonu ve ba\u011f\u0131ml\u0131l\u0131klar\u0131n\u0131 (dependencies) al\u0131r ve bu fonksiyonu yaln\u0131zca ba\u011f\u0131ml\u0131l\u0131klardan biri de\u011fi\u015fti\u011finde yeniden olu\u015fturur.  Ba\u011f\u0131ml\u0131l\u0131klarda bir de\u011fi\u015fiklik olmad\u0131\u011f\u0131 s\u00fcrece, ayn\u0131 fonksiyon referans\u0131 d\u00f6nd\u00fcr\u00fcl\u00fcr.  Bu sayede, React, fonksiyonun yeniden olu\u015fturulmad\u0131\u011f\u0131n\u0131 anlar ve bile\u015fen yeniden render edilse bile, fonksiyonun yeniden olu\u015fturulmas\u0131 gerekmedi\u011fini bilir.<\/p>\n<p>\u00d6rne\u011fin, bir <code>onClick<\/code> olay\u0131na ba\u011fl\u0131 bir fonksiyonunuz oldu\u011funu d\u00fc\u015f\u00fcn\u00fcn. Bu fonksiyon, her renderda yeniden olu\u015fturulursa, performans sorunlar\u0131na yol a\u00e7abilir. <code>useCallback<\/code> ile bu fonksiyonu belle\u011fe alarak, yaln\u0131zca ba\u011f\u0131ml\u0131l\u0131klar\u0131 de\u011fi\u015fti\u011finde yeniden olu\u015fturulmas\u0131n\u0131 sa\u011flayabilirsiniz.  A\u015fa\u011f\u0131daki \u00f6rnekte bunu g\u00f6rebiliriz:<\/p>\n<pre><code class=\"language-javascript\">\nimport React, { useState, useCallback } from 'react';\n\nfunction MyComponent() {\n  const [count, setCount] = useState(0);\n\n  const increment = useCallback(() => {\n    setCount(count + 1);\n  }, [count]); \/\/ count de\u011fi\u015firse increment yeniden olu\u015fturulur\n\n  return (\n    <div>\n      <p>Say\u0131: {count}<\/p>\n      <button onClick={increment}>Artt\u0131r<\/button>\n    <\/div>\n  );\n}\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>increment<\/code> fonksiyonu <code>useCallback<\/code> ile belle\u011fe al\u0131nm\u0131\u015ft\u0131r.  <code>count<\/code> de\u011fi\u015fkeni ba\u011f\u0131ml\u0131l\u0131k olarak belirtilmi\u015ftir.  Yani, sadece <code>count<\/code> de\u011fi\u015fkeninin de\u011feri de\u011fi\u015fti\u011finde <code>increment<\/code> fonksiyonu yeniden olu\u015fturulur.  Di\u011fer durumlarda, ayn\u0131 fonksiyon referans\u0131 kullan\u0131l\u0131r.<\/p>\n<p><code>useCallback<\/code>&#8216;\u0131n en b\u00fcy\u00fck avantaj\u0131, performans optimizasyonudur. \u00d6zellikle b\u00fcy\u00fck ve karma\u015f\u0131k bile\u015fenlerde, gereksiz fonksiyon olu\u015fturulmalar\u0131n\u0131 \u00f6nleyerek uygulaman\u0131z\u0131n daha h\u0131zl\u0131 ve daha verimli \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar.  Ancak, her fonksiyon i\u00e7in <code>useCallback<\/code> kullanmak gereksiz olabilir.  Performans sorunlar\u0131 ya\u015famadan \u00f6nce, uygulaman\u0131z\u0131n performans\u0131n\u0131 analiz ederek, <code>useCallback<\/code>&#8216;\u0131n gerekli oldu\u011fu yerleri belirlemeniz \u00f6nemlidir.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">Fatih Soysal&#8217;\u0131n web sitesini<\/a> ziyaret edebilirsiniz.<\/p>\n<p>Sonu\u00e7 olarak, <code>useCallback<\/code>, React uygulamalar\u0131nda performans\u0131 iyile\u015ftirmek i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r.  Fonksiyonlar\u0131n gereksiz yeniden olu\u015fturulmas\u0131n\u0131 \u00f6nleyerek, uygulaman\u0131z\u0131n daha h\u0131zl\u0131 ve daha verimli \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar. Do\u011fru kullan\u0131ld\u0131\u011f\u0131nda, <code>useCallback<\/code>, uygulaman\u0131z\u0131n genel performans\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir. Ancak, gereksiz yere kullan\u0131m\u0131 da performans kayb\u0131na yol a\u00e7abilir.  Bu nedenle, uygulaman\u0131z\u0131n performans\u0131n\u0131 dikkatlice izleyerek ve analiz ederek, <code>useCallback<\/code>&#8216;\u0131 stratejik olarak kullanman\u0131z \u00f6nemlidir.<\/p>\n<p>Umar\u0131m bu makale, React&#8217;te <code>useCallback<\/code> hook&#8217;unun nas\u0131l kullan\u0131laca\u011f\u0131 konusunda size yard\u0131mc\u0131 olmu\u015ftur. Daha fazla sorunuz varsa, l\u00fctfen yorum b\u0131rakmaktan \u00e7ekinmeyin!<\/p>\n<p>#Etiketler: React, useCallback, performans, optimizasyon, hook, fonksiyon bellekleme, yeniden olu\u015fturma, React optimizasyonu, memoization<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"React&#8217;te useCallback: Fonksiyon Bellekleme ve Yeniden Olu\u015fturma \u00d6nleme React uygulamalar\u0131nda performans optimizasyonu son derece \u00f6nemlidir. \u00d6zellikle karma\u015f\u0131k uygulamalarda,&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-22287","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 useCallback: Fonksiyon Bellekleme ve Yeniden Olu\u015fturma \u00d6nleme<\/title>\n<meta name=\"description\" content=\"React uygulamalar\u0131nda performans optimizasyonu son derece \u00f6nemlidir. \u00d6zellikle karma\u015f\u0131k uygulamalarda, bile\u015fenlerin gereksiz yere yeniden renderlanmas\u0131 performans sorunlar\u0131na yol a\u00e7abilir. Bu noktada React&#039;in sundu\u011fu useCallback hook&#039;u devreye girer. useCallback, fonksiyonlar\u0131 belle\u011fe alarak (memoize ederek), gereksiz yeniden olu\u015fturulmalar\u0131n\u0131 engeller ve uygulaman\u0131z\u0131n daha verimli \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar.\" \/>\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-usecallback-fonksiyon-bellekleme-ve-yeniden-olusturma-onleme\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"React&#039;te useCallback: Fonksiyon Bellekleme ve Yeniden Olu\u015fturma \u00d6nleme\" \/>\n<meta property=\"og:description\" content=\"React uygulamalar\u0131nda performans optimizasyonu son derece \u00f6nemlidir. \u00d6zellikle karma\u015f\u0131k uygulamalarda, bile\u015fenlerin gereksiz yere yeniden renderlanmas\u0131 performans sorunlar\u0131na yol a\u00e7abilir. 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