{"id":29220,"date":"2025-09-09T14:00:27","date_gmt":"2025-09-09T11:00:27","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/react-js-ipuclari-2-bolum-temiz-ve-guclu-kod-icin-gelismis-teknikler\/"},"modified":"2025-09-09T14:00:27","modified_gmt":"2025-09-09T11:00:27","slug":"react-js-ipuclari-2-bolum-temiz-ve-guclu-kod-icin-gelismis-teknikler","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/react-js-ipuclari-2-bolum-temiz-ve-guclu-kod-icin-gelismis-teknikler\/","title":{"rendered":"React.js \u0130pu\u00e7lar\u0131: 2. B\u00f6l\u00fcm &#8211; Temiz ve G\u00fc\u00e7l\u00fc Kod \u0130\u00e7in Geli\u015fmi\u015f Teknikler"},"content":{"rendered":"<p>React.js \u0130pu\u00e7lar\u0131: 2. B\u00f6l\u00fcm &#8211; Temiz ve G\u00fc\u00e7l\u00fc Kod \u0130\u00e7in Geli\u015fmi\u015f Teknikler<\/p>\n<p>React ile geli\u015ftirme yaparken performans\u0131 art\u0131rmak ve kod kalitesini y\u00fckseltmek i\u00e7in s\u00fcrekli yeni yollar ar\u0131yorsunuz, de\u011fil mi?  Bu makalede, React.js&#8217;in g\u00fcc\u00fcnden tam olarak yararlanman\u0131za yard\u0131mc\u0131 olacak geli\u015fmi\u015f teknikleri, ger\u00e7ek d\u00fcnya senaryolar\u0131n\u0131 ve performans optimizasyonlar\u0131n\u0131 ele alaca\u011f\u0131z.  Yeni ba\u015flayanlardan deneyimli geli\u015ftiricilere kadar herkes i\u00e7in faydal\u0131 ipu\u00e7lar\u0131 ve \u00f6rneklerle dolu bu rehber, React kodunuzu bir \u00fcst seviyeye ta\u015f\u0131man\u0131za yard\u0131mc\u0131 olacak.<\/p>\n<h2>React.js \u00d6\u011frenme Yol Haritas\u0131<\/h2>\n<p>Bu makaledeki konular\u0131 anlamak i\u00e7in, React&#8217;in temel prensiplerine a\u015fina olman\u0131z \u00f6nemlidir. \u0130\u015fte \u00f6\u011frenme yol haritam\u0131z:<\/p>\n<ul>\n<li><strong>Yeni Ba\u015flayan:<\/strong>  React&#8217;in temel bile\u015fenleri (fonksiyonel ve s\u0131n\u0131f bile\u015fenleri), JSX, props ve state kavramlar\u0131.  Bu konularda yeterince bilgi sahibiyseniz, bu makaledeki ileri d\u00fczey konulara kolayl\u0131kla ge\u00e7ebilirsiniz.<\/li>\n<li><strong>Orta Seviye:<\/strong>  Hook&#8217;lar (useState, useEffect, useContext), ko\u015fullu renderlama, liste renderlama, form y\u00f6netimi, routing (React Router).  Orta seviyedeki bilgiler bu makalenin \u00e7o\u011funu anlaman\u0131z i\u00e7in yeterli olacakt\u0131r.<\/li>\n<li><strong>\u0130leri Seviye:<\/strong>  Performans optimizasyonu, kod b\u00f6lme, test yazma, state y\u00f6netimi (Redux, Zustand, Recoil), geli\u015fmi\u015f hook&#8217;lar, React Context API&#8217;sinin derinlemesine kullan\u0131m\u0131. \u0130leri seviye bilgiler, makaledeki en geli\u015fmi\u015f teknikleri tam olarak anlaman\u0131z i\u00e7in gereklidir.<\/li>\n<\/ul>\n<h2>React Performans\u0131n\u0131 Nas\u0131l Optimize Ederim?<\/h2>\n<p>React uygulamalar\u0131n\u0131n performans\u0131n\u0131 optimize etmek, kullan\u0131c\u0131 deneyimini iyile\u015ftirmek i\u00e7in kritik \u00f6neme sahiptir.  Bu noktada, gereksiz renderlamalar\u0131 azaltmak ve uygulama boyutunu k\u00fc\u00e7\u00fcltmek i\u00e7in \u00e7e\u015fitli teknikler kullanabiliriz. \u00d6rne\u011fin, <code>useMemo<\/code> ve <code>useCallback<\/code> hook&#8217;lar\u0131, pahal\u0131 hesaplamalar\u0131 veya fonksiyonlar\u0131 \u00f6nbelle\u011fe alarak tekrarlanan hesaplamalar\u0131 \u00f6nler.  A\u015fa\u011f\u0131daki \u00f6rnekte, <code>expensiveCalculation<\/code> fonksiyonunun sonucu <code>useMemo<\/code> ile \u00f6nbelle\u011fe al\u0131nm\u0131\u015ft\u0131r:<\/p>\n<pre><code class=\"language-javascript\">import React, { useMemo, useState } from &#039;react&#039;;\n\nfunction MyComponent() {\n  const [count, setCount] = useState(0);\n\n  const doubledCount = useMemo(() => {\n    console.log(&#039;Expensive calculation!&#039;); \/\/ Sadece gerekli oldu\u011funda \u00e7al\u0131\u015f\u0131r\n    return count * 2;\n  }, [count]);\n\n  return (\n    <div>\n      <p>Count: {count}<\/p>\n      <p>Doubled Count: {doubledCount}<\/p>\n      <button onClick={() => setCount(count + 1)}>Increment<\/button>\n    <\/div>\n  );\n}<\/pre>\n<p><\/code><\/p>\n<p>Ayr\u0131ca, <code>React.memo<\/code> y\u00fcksek performansl\u0131 bir bile\u015fen olu\u015fturarak gereksiz renderlar\u0131 \u00f6nlemek i\u00e7in kullan\u0131labilir. Bu, bile\u015fen props'lar\u0131n\u0131n de\u011fi\u015fmedi\u011fi durumlarda bile\u015fenin tekrar renderlanmas\u0131n\u0131 engeller.<\/p>\n<h2>React'te Kod B\u00f6lme (Code Splitting) Nas\u0131l Yap\u0131l\u0131r?<\/h2>\n<p>B\u00fcy\u00fck React uygulamalar\u0131nda, kod b\u00f6lme performans\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirebilir.  Kod b\u00f6lme, uygulamay\u0131 daha k\u00fc\u00e7\u00fck, ba\u011f\u0131ms\u0131z par\u00e7alara ay\u0131rman\u0131za olanak tan\u0131r.  Bu, ba\u015flang\u0131\u00e7 zaman\u0131n\u0131 k\u0131salt\u0131r ve kullan\u0131c\u0131lar\u0131n yaln\u0131zca ihtiya\u00e7 duyduklar\u0131 par\u00e7alar\u0131 indirmelerini sa\u011flar.  React.lazy ve Suspense bile\u015fenleri ile kod b\u00f6lme kolayca uygulanabilir.  A\u015fa\u011f\u0131daki \u00f6rnekte, <code>LazyComponent<\/code> dinamik olarak y\u00fcklenir:<\/p>\n<pre><code class=\"language-javascript\">import React, { lazy, Suspense } from &#039;react&#039;;\n\nconst LazyComponent = lazy(() => import(&#039;.\/LazyComponent&#039;));\n\nfunction MyComponent() {\n  return (\n    <Suspense fallback={<div>Loading...<\/div>}>\n      <LazyComponent \/>\n    <\/Suspense>\n  );\n}<\/pre>\n<p><\/code><\/p>\n<p>Bu, kullan\u0131c\u0131n\u0131n <code>LazyComponent<\/code>'\u0131 kullanana kadar indirmeye ba\u015flamaz, bu sayede ilk y\u00fckleme s\u00fcresini \u00f6nemli \u00f6l\u00e7\u00fcde k\u0131saltabilir. Daha fazla bilgi i\u00e7in (https:\/\/fatihsoysal.com) inceleyebilirsiniz.<\/p>\n<h2>React Context API'sini Etkin \u015eekilde Kullanma<\/h2>\n<p>React Context API, uygulaman\u0131z genelinde veriyi payla\u015fmak i\u00e7in g\u00fc\u00e7l\u00fc bir yoldur.  Ancak, yanl\u0131\u015f kullan\u0131ld\u0131\u011f\u0131nda performans sorunlar\u0131na yol a\u00e7abilir.  Context'in sadece gerekli durumlarda kullan\u0131lmas\u0131 ve derinlemesine nesne yap\u0131lar\u0131n\u0131n yerine k\u00fc\u00e7\u00fck, gerekli datalar\u0131n kullan\u0131lmas\u0131 \u00f6nemlidir.  Ayr\u0131ca, <code>useMemo<\/code> hook'u ile context de\u011ferlerini \u00f6nbelle\u011fe alarak gereksiz hesaplamalar\u0131 azaltabilirsiniz. <\/p>\n<p>\u00d6rne\u011fin, b\u00fcy\u00fck bir veri yap\u0131s\u0131n\u0131 context ile payla\u015fmak yerine, yaln\u0131zca gerekli alt k\u00fcmeleri payla\u015farak performans\u0131 art\u0131rabilirsiniz.  Bu, gereksiz renderlar\u0131 azalt\u0131r ve uygulaman\u0131n daha h\u0131zl\u0131 \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar.<\/p>\n<h2>React'te G\u00fcvenli Kod Yazma<\/h2>\n<p><strong>Dikkat:<\/strong>  Kullan\u0131c\u0131 girdilerini do\u011frulamamak, Cross-Site Scripting (XSS) gibi g\u00fcvenlik a\u00e7\u0131klar\u0131na yol a\u00e7abilir.  Her zaman kullan\u0131c\u0131 girdilerini do\u011frulay\u0131n ve sanitize edin.  React'te g\u00fcvenli kod yazmak i\u00e7in, sanitize k\u00fct\u00fcphaneleri kullanabilir veya kendi do\u011frulama fonksiyonlar\u0131n\u0131z\u0131 yazabilirsiniz.<\/p>\n<p>Ayr\u0131ca,  uygulaman\u0131zda kullan\u0131lan t\u00fcm k\u00fct\u00fcphanelerin g\u00fcncel oldu\u011fundan emin olun.  Eski s\u00fcr\u00fcmlerdeki g\u00fcvenlik a\u00e7\u0131klar\u0131ndan korunmak i\u00e7in d\u00fczenli olarak g\u00fcncellemeler yap\u0131n.  Daha fazla g\u00fcvenlik ipucu i\u00e7in (https:\/\/fatihsoysal.com) web sitemizi ziyaret edebilirsiniz.<\/p>\n<h2>Hook'lar ile Karma\u015f\u0131k Durum Y\u00f6netimi: Bir Vaka \u00c7al\u0131\u015fmas\u0131<\/h2>\n<p>Bir e-ticaret uygulamas\u0131nda, \u00fcr\u00fcn listesinin ve sepetin durumunu y\u00f6netmek i\u00e7in custom hook\u2019lar kullanabiliriz. Bu yakla\u015f\u0131m, kodun daha okunabilir ve s\u00fcrd\u00fcr\u00fclebilir olmas\u0131n\u0131 sa\u011flar.  A\u015fa\u011f\u0131daki \u00f6rnekte, \u00fcr\u00fcn listesini ve sepeti y\u00f6netmek i\u00e7in <code>useProductManager<\/code> ad\u0131nda bir custom hook kullan\u0131lm\u0131\u015ft\u0131r:<\/p>\n<pre><code class=\"language-javascript\">import { useState } from &#039;react&#039;;\n\nconst useProductManager = () => {\n  const [products, setProducts] = useState([]);\n  const [cart, setCart] = useState([]);\n\n  const addToCart = (product) => {\n    setCart([...cart, product]);\n  };\n\n  const removeFromCart = (product) => {\n    setCart(cart.filter((item) => item.id !== product.id));\n  };\n\n  return { products, cart, addToCart, removeFromCart };\n};\n\nexport default useProductManager;<\/pre>\n<p><\/code><\/p>\n<p>Bu hook, \u00fcr\u00fcn listesini ve sepeti y\u00f6netmek i\u00e7in gerekli fonksiyonlar\u0131 sa\u011flar.  Bu sayede, uygulaman\u0131n farkl\u0131 bile\u015fenlerinde ayn\u0131 mant\u0131\u011f\u0131 tekrar tekrar yazmak zorunda kalmay\u0131z.  Bu durum, kodun temizli\u011fini, okunabilirli\u011fini ve s\u00fcrd\u00fcr\u00fclebilirli\u011fini art\u0131r\u0131r.<\/p>\n<h2>Performans Kar\u015f\u0131la\u015ft\u0131rmas\u0131: Tablolar m\u0131, Listeler mi?<\/h2>\n<p>B\u00fcy\u00fck miktarda veriyi g\u00f6r\u00fcnt\u00fclerken, performans b\u00fcy\u00fck \u00f6nem ta\u015f\u0131r.  Tablolar ve listeler aras\u0131nda performans kar\u015f\u0131la\u015ft\u0131rmas\u0131 yap\u0131ld\u0131\u011f\u0131nda, genellikle listeler daha verimlidir.  Ancak, tablolar daha d\u00fczenli ve okunabilir bir g\u00f6r\u00fcn\u00fcm sunar.  Optimal yakla\u015f\u0131m, veri k\u00fcmesinin b\u00fcy\u00fckl\u00fc\u011f\u00fcne ve uygulama gereksinimlerine ba\u011fl\u0131 olarak de\u011fi\u015fir.  K\u00fc\u00e7\u00fck veri k\u00fcmeleri i\u00e7in tablolar, b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in ise optimizasyonlu listeler tercih edilmelidir.<\/p>\n<table>\n<thead>\n<tr>\n<th>Y\u00f6ntem<\/th>\n<th>Performans<\/th>\n<th>Okunabilirlik<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Listeler (optimize edilmi\u015f)<\/td>\n<td>Y\u00fcksek<\/td>\n<td>Orta<\/td>\n<\/tr>\n<tr>\n<td>Tablolar<\/td>\n<td>Orta<\/td>\n<td>Y\u00fcksek<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0130leri D\u00fczey React Teknikleri: Suspense ve Async\/Await<\/h2>\n<p>Suspense ve Async\/Await kombinasyonu, asenkron veri y\u00fcklemelerini daha iyi y\u00f6netmenizi sa\u011flar. Suspense, veri y\u00fcklenirken bir y\u00fckleniyor g\u00f6stergesi g\u00f6stermenizi ve veri y\u00fcklendikten sonra bile\u015feni g\u00f6r\u00fcnt\u00fclemenizi sa\u011flar.  Async\/Await, asenkron kodlar\u0131 daha senkron gibi yazman\u0131za olanak tan\u0131r, bu da kodun okunabilirli\u011fini art\u0131r\u0131r.<\/p>\n<pre><code class=\"language-javascript\">import React, { Suspense, lazy } from &#039;react&#039;;\n\nconst MyComponent = lazy(() => import(&#039;.\/MyComponent&#039;).then(module => ({ default: module.MyComponent })));\n\nfunction App() {\n    return (\n        <Suspense fallback={<div>Y\u00fckleniyor...<\/div>}>\n            <MyComponent \/>\n        <\/Suspense>\n    );\n}\n\nexport default App;<\/pre>\n<p><\/code><\/p>\n<p>Bu \u00f6rnekte, <code>MyComponent<\/code> asenkron olarak y\u00fcklenir ve Suspense, veri y\u00fcklenirken bir \"Y\u00fckleniyor...\" mesaj\u0131 g\u00f6sterir.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Bu makalede, React.js ile temiz ve g\u00fc\u00e7l\u00fc kod yazmak i\u00e7in geli\u015fmi\u015f teknikleri inceledik. Performans optimizasyonu, kod b\u00f6lme, g\u00fcvenlik ve durum y\u00f6netimi gibi konulara de\u011findik.  Umar\u0131m bu ipu\u00e7lar\u0131, React uygulamalar\u0131n\u0131z\u0131n kalitesini art\u0131rman\u0131za yard\u0131mc\u0131 olur.  Daha fazla bilgi ve ileri d\u00fczey teknikler i\u00e7in (https:\/\/fatihsoysal.com) web sitemizi ziyaret edebilirsiniz.  <\/p>\n<h3>S\u0131k\u00e7a Sorulan Sorular<\/h3>\n<ul>\n<li><strong>Soru:<\/strong> <code>useMemo<\/code> ve <code>useCallback<\/code> hook'lar\u0131 aras\u0131ndaki fark nedir? <br \/><strong>Cevap:<\/strong> <code>useMemo<\/code>, bir de\u011fer d\u00f6nd\u00fcren bir fonksiyonu \u00f6nbelle\u011fe al\u0131rken, <code>useCallback<\/code>, bir fonksiyonu \u00f6nbelle\u011fe al\u0131r.  <code>useMemo<\/code> pahal\u0131 hesaplamalar i\u00e7in kullan\u0131l\u0131rken, <code>useCallback<\/code> pahal\u0131 fonksiyonlar i\u00e7in kullan\u0131l\u0131r.<\/li>\n<li><strong>Soru:<\/strong> React Context API'si ne zaman kullan\u0131lmal\u0131d\u0131r? <br \/><strong>Cevap:<\/strong>  Bir bile\u015fenden di\u011ferine veri aktarman\u0131z gerekti\u011finde, \u00f6zellikle prop drilling'i \u00f6nlemek i\u00e7in React Context API'si kullan\u0131lmal\u0131d\u0131r. Ancak b\u00fcy\u00fck veri yap\u0131lar\u0131 i\u00e7in performans kayb\u0131na yol a\u00e7abilece\u011fi unutulmamal\u0131d\u0131r. <\/li>\n<li><strong>Soru:<\/strong> Kod b\u00f6lme neden \u00f6nemlidir? <br \/><strong>Cevap:<\/strong> Kod b\u00f6lme, uygulaman\u0131z\u0131n ba\u015flang\u0131\u00e7 y\u00fcklenme s\u00fcresini azalt\u0131r ve kullan\u0131c\u0131lar\u0131n yaln\u0131zca ihtiya\u00e7 duyduklar\u0131 par\u00e7alar\u0131 indirmelerini sa\u011flar, bu da performans\u0131 art\u0131r\u0131r ve kullan\u0131c\u0131 deneyimini iyile\u015ftirir.<\/li>\n<li><strong>Soru:<\/strong> React'te g\u00fcvenli kod yazmak i\u00e7in neler yap\u0131lmal\u0131d\u0131r? <br \/><strong>Cevap:<\/strong> Kullan\u0131c\u0131 girdilerini her zaman do\u011frulay\u0131n ve sanitize edin, g\u00fcvenli k\u00fct\u00fcphaneler kullan\u0131n ve uygulaman\u0131z\u0131 d\u00fczenli olarak g\u00fcncelleyin. <\/li>\n<li><strong>Soru:<\/strong> Custom hook'lar ne i\u015fe yarar? <br \/><strong>Cevap:<\/strong> Custom hook'lar, belirli bir mant\u0131\u011f\u0131 veya i\u015flevi bir araya getirir ve uygulaman\u0131z\u0131n farkl\u0131 bile\u015fenlerinde tekrar kullan\u0131labilir hale getirir, kodun temizli\u011fini ve s\u00fcrd\u00fcr\u00fclebilirli\u011fini art\u0131r\u0131r.<\/li>\n<\/ul>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"React.js \u0130pu\u00e7lar\u0131: 2. B\u00f6l\u00fcm &#8211; Temiz ve G\u00fc\u00e7l\u00fc Kod \u0130\u00e7in Geli\u015fmi\u015f Teknikler React ile geli\u015ftirme yaparken performans\u0131 art\u0131rmak&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-29220","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.js \u0130pu\u00e7lar\u0131: 2. B\u00f6l\u00fcm - Temiz ve G\u00fc\u00e7l\u00fc Kod \u0130\u00e7in Geli\u015fmi\u015f Teknikler<\/title>\n<meta name=\"description\" content=\"React ile geli\u015ftirme yaparken performans\u0131 art\u0131rmak ve kod kalitesini y\u00fckseltmek i\u00e7in s\u00fcrekli yeni yollar ar\u0131yorsunuz, de\u011fil mi? Bu makalede, React.js&#039;in g\u00fcc\u00fcnden tam olarak yararlanman\u0131za yard\u0131mc\u0131 olacak geli\u015fmi\u015f teknikleri, ger\u00e7ek d\u00fcnya senaryolar\u0131n\u0131 ve performans optimizasyonlar\u0131n\u0131 ele alaca\u011f\u0131z. Yeni ba\u015flayanlardan deneyimli geli\u015ftiricilere kadar herkes i\u00e7in faydal\u0131 ipu\u00e7lar\u0131 ve \u00f6rneklerle dolu bu rehber, React kodunuzu bir \u00fcst seviyeye ta\u015f\u0131man\u0131za yard\u0131mc\u0131 olacak.\" \/>\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\/react-js-ipuclari-2-bolum-temiz-ve-guclu-kod-icin-gelismis-teknikler\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"React.js \u0130pu\u00e7lar\u0131: 2. B\u00f6l\u00fcm - Temiz ve G\u00fc\u00e7l\u00fc Kod \u0130\u00e7in Geli\u015fmi\u015f Teknikler\" \/>\n<meta property=\"og:description\" content=\"React ile geli\u015ftirme yaparken performans\u0131 art\u0131rmak ve kod kalitesini y\u00fckseltmek i\u00e7in s\u00fcrekli yeni yollar ar\u0131yorsunuz, de\u011fil mi? 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