{"id":38981,"date":"2026-02-11T22:40:58","date_gmt":"2026-02-11T19:40:58","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/?p=38981"},"modified":"2026-02-11T22:40:58","modified_gmt":"2026-02-11T19:40:58","slug":"react-window-ile-tanismak-buyuk-listeleri-verimli-bir-sekilde-olusturma-kilavuzu","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/react-window-ile-tanismak-buyuk-listeleri-verimli-bir-sekilde-olusturma-kilavuzu\/","title":{"rendered":"react-window ile Tan\u0131\u015fmak: B\u00fcy\u00fck Listeleri Verimli Bir \u015eekilde Olu\u015fturma K\u0131lavuzu"},"content":{"rendered":"<p><body><\/p>\n<h2>react-window ile Tan\u0131\u015fmak: B\u00fcy\u00fck Listeleri Verimli Bir \u015eekilde Olu\u015fturma K\u0131lavuzu<\/h2>\n<p>Modern web uygulamalar\u0131, kullan\u0131c\u0131lar\u0131na zengin ve dinamik aray\u00fczler sunarken, genellikle b\u00fcy\u00fck veri k\u00fcmeleriyle \u00e7al\u0131\u015fmak zorunda kal\u0131r. Bu veri k\u00fcmeleri, \u00f6zellikle listeler veya tablolar halinde sunuldu\u011funda, uygulama performans\u0131n\u0131 ciddi \u015fekilde etkileyebilir. Binlerce, hatta on binlerce \u00f6\u011feden olu\u015fan bir listeyi do\u011frudan DOM&#8217;a (Document Object Model) render etmek, taray\u0131c\u0131n\u0131n kaynaklar\u0131n\u0131 a\u015f\u0131r\u0131 t\u00fcketerek yava\u015flamaya, donmalara ve k\u00f6t\u00fc bir kullan\u0131c\u0131 deneyimine yol a\u00e7abilir. \u0130\u015fte tam bu noktada sanalizasyon (virtualization) veya pencereleme (windowing) teknikleri devreye girer ve <code>react-window<\/code> bu alandaki en pop\u00fcler ve etkili k\u00fct\u00fcphanelerden biridir.<\/p>\n<p>Bu kapsaml\u0131 makalede, <code>react-window<\/code>&#8216;un ne oldu\u011funu, neden bu kadar \u00f6nemli oldu\u011funu, nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 ve uygulamalar\u0131n\u0131zda b\u00fcy\u00fck listeleri verimli bir \u015fekilde y\u00f6netmek i\u00e7in nas\u0131l kullanabilece\u011finizi derinlemesine inceleyece\u011fiz. Temel kullan\u0131m\u0131ndan geli\u015fmi\u015f senaryolara, optimizasyon tekniklerinden birlikte kullan\u0131labilecek di\u011fer k\u00fct\u00fcphanelere kadar her y\u00f6n\u00fcyle <code>react-window<\/code>&#8216;u ele alaca\u011f\u0131z.<\/p>\n<h3>Neden react-window&#8217;a \u0130htiya\u00e7 Duyar\u0131z?<\/h3>\n<p>Web uygulamalar\u0131nda performans, kullan\u0131c\u0131 memnuniyetinin temel ta\u015flar\u0131ndan biridir. \u00d6zellikle tek sayfa uygulamalar\u0131 (SPA&#8217;lar) ve veri yo\u011fun aray\u00fczler geli\u015ftirirken, performans darbo\u011fazlar\u0131 ka\u00e7\u0131n\u0131lmaz hale gelebilir. B\u00fcy\u00fck listeler, bu darbo\u011fazlar\u0131n en yayg\u0131n kaynaklar\u0131ndan biridir. Peki, neden b\u00fcy\u00fck listeler performans\u0131 olumsuz etkiler?<\/p>\n<p>Bir React uygulamas\u0131nda, her bir liste \u00f6\u011fesi genellikle kendi bile\u015fenini temsil eder ve bu bile\u015fenler DOM&#8217;a render edilir. 10.000 \u00f6\u011felik bir liste d\u00fc\u015f\u00fcn\u00fcn:<\/p>\n<p>*   <strong>DOM Manip\u00fclasyonu:<\/strong> Taray\u0131c\u0131n\u0131n 10.000&#8217;den fazla DOM d\u00fc\u011f\u00fcm\u00fc olu\u015fturmas\u0131, g\u00fcncellemesi ve y\u00f6netmesi gerekir. Bu i\u015flemler, \u00f6zellikle her kayd\u0131rma veya veri g\u00fcncellemesinde, \u00f6nemli CPU zaman\u0131 ve bellek t\u00fcketimi anlam\u0131na gelir.<br \/>\n*   <strong>Bellek T\u00fcketimi:<\/strong> Her bir DOM d\u00fc\u011f\u00fcm\u00fc ve onunla ili\u015fkili JavaScript nesneleri (olay dinleyicileri, stil bilgileri vb.) bellekte yer kaplar. B\u00fcy\u00fck listeler, y\u00fczlerce megabayt belle\u011fi kolayca t\u00fcketebilir, bu da \u00f6zellikle mobil cihazlarda veya d\u00fc\u015f\u00fck \u00f6zellikli makinelerde uygulamalar\u0131n \u00e7\u00f6kmesine neden olabilir.<br \/>\n*   <strong>Layout ve Paint \u0130\u015flemleri:<\/strong> Taray\u0131c\u0131n\u0131n, t\u00fcm bu \u00f6\u011felerin konumunu ve stilini hesaplamas\u0131 (layout) ve ard\u0131ndan ekrana \u00e7izmesi (paint) gerekir. Bu i\u015flemler, liste b\u00fcy\u00fcd\u00fck\u00e7e katlanarak artar ve ak\u0131c\u0131 kayd\u0131rma deneyimini engeller.<br \/>\n*   <strong>JavaScript Y\u00fcr\u00fctme:<\/strong> React&#8217;in sanal DOM fark\u0131 alma (diffing) ve uzla\u015ft\u0131rma (reconciliation) s\u00fcre\u00e7leri bile b\u00fcy\u00fck listelerde yava\u015flayabilir, \u00e7\u00fcnk\u00fc t\u00fcm \u00f6\u011feler i\u00e7in prop kar\u015f\u0131la\u015ft\u0131rmalar\u0131 yap\u0131lmas\u0131 gerekir.<\/p>\n<p>Bu sorunlar\u0131 \u00e7\u00f6zmek i\u00e7in sanalizasyon ad\u0131 verilen bir teknik kullan\u0131l\u0131r. <code>react-window<\/code>, React ekosisteminde bu tekni\u011fi uygulayan, hafif ve h\u0131zl\u0131 bir k\u00fct\u00fcphanedir.<\/p>\n<h3>Sanalizasyon (Virtualization) Nedir ve Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/h3>\n<p>Sanalizasyon, &#8220;pencereleme&#8221; olarak da bilinir, b\u00fcy\u00fck listelerin performans sorunlar\u0131n\u0131 \u00e7\u00f6zmek i\u00e7in kullan\u0131lan temel bir optimizasyon tekni\u011fidir. Bu tekni\u011fin arkas\u0131ndaki ana fikir basittir: <strong>Sadece o an kullan\u0131c\u0131n\u0131n ekran\u0131nda g\u00f6r\u00fcnen (veya \u00e7ok az bir tampon b\u00f6lgeyle g\u00f6r\u00fcn\u00fcr hale gelmek \u00fczere olan) \u00f6\u011feleri render et.<\/strong> Geri kalan \u00f6\u011feler DOM&#8217;a eklenmez, dolay\u0131s\u0131yla taray\u0131c\u0131n\u0131n i\u015f y\u00fck\u00fc b\u00fcy\u00fck \u00f6l\u00e7\u00fcde azal\u0131r.<\/p>\n<p>Sanalizasyonun \u00e7al\u0131\u015fma prensibi ad\u0131mlar halinde \u015f\u00f6yle \u00f6zetlenebilir:<\/p>\n<p>1.  <strong>G\u00f6r\u00fcn\u00fcm Alan\u0131n\u0131n Tespiti:<\/strong> K\u00fct\u00fcphane, listenin i\u00e7inde bulundu\u011fu kapsay\u0131c\u0131 eleman\u0131n (viewport) boyutunu ve kayd\u0131rma pozisyonunu s\u00fcrekli olarak izler.<br \/>\n2.  <strong>G\u00f6r\u00fcn\u00fcr \u00d6\u011felerin Hesaplanmas\u0131:<\/strong> Bu bilgilere dayanarak, hangi liste \u00f6\u011felerinin g\u00f6r\u00fcn\u00fcm alan\u0131na girdi\u011fini veya girmek \u00fczere oldu\u011funu (genellikle bir &#8220;overscan&#8221; veya tampon b\u00f6lge ile) hesaplar.<br \/>\n3.  <strong>Dinamik Render:<\/strong> Sadece bu hesaplanan g\u00f6r\u00fcn\u00fcr \u00f6\u011feler DOM&#8217;a eklenir ve render edilir. G\u00f6r\u00fcn\u00fcm alan\u0131 d\u0131\u015f\u0131ndaki \u00f6\u011feler DOM&#8217;dan kald\u0131r\u0131l\u0131r.<br \/>\n4.  <strong>Bo\u015fluk B\u0131rakma (Placeholder):<\/strong> G\u00f6r\u00fcn\u00fcr olmayan \u00f6\u011felerin kaplayaca\u011f\u0131 toplam alan\u0131 korumak i\u00e7in, listenin ba\u015f\u0131nda ve sonunda uygun y\u00fckseklikte (dikey listeler i\u00e7in) veya geni\u015flikte (yatay listeler i\u00e7in) bo\u015f DOM elemanlar\u0131 (genellikle bir <code>div<\/code>) olu\u015fturulur. Bu, kayd\u0131rma \u00e7ubu\u011funun do\u011fru boyutta olmas\u0131n\u0131 ve kullan\u0131c\u0131n\u0131n listenin tamam\u0131 \u00fczerinde kayd\u0131r\u0131yormu\u015f gibi hissetmesini sa\u011flar.<br \/>\n5.  <strong>\u00d6\u011fe Yeniden Kullan\u0131m\u0131:<\/strong> Kullan\u0131c\u0131 kayd\u0131rd\u0131\u011f\u0131nda, g\u00f6r\u00fcn\u00fcm alan\u0131ndan \u00e7\u0131kan \u00f6\u011feler DOM&#8217;dan tamamen kald\u0131r\u0131lmak yerine, yeni g\u00f6r\u00fcn\u00fcm alan\u0131na giren \u00f6\u011feler i\u00e7in yeniden kullan\u0131l\u0131r. Bu, DOM manip\u00fclasyonunun maliyetini daha da azalt\u0131r.<\/p>\n<p><code>react-window<\/code>, bu mekanizmay\u0131 React bile\u015fenleri d\u00fcnyas\u0131na ta\u015f\u0131r. Kendisinden \u00f6nce gelen <code>react-virtualized<\/code>&#8216;a g\u00f6re daha k\u00fc\u00e7\u00fck bir boyuta ve daha basit bir API&#8217;ye sahiptir, \u00e7\u00fcnk\u00fc sadece listeleme ve \u0131zgara (grid) sanalizasyonuna odaklanm\u0131\u015ft\u0131r.<\/p>\n<h3>react-window&#8217;un Temelleri: Kurulum ve \u0130lk Ad\u0131mlar<\/h3>\n<p><code>react-window<\/code>&#8216;u projenize dahil etmek olduk\u00e7a basittir. \u00d6ncelikle, k\u00fct\u00fcphaneyi projenize kurman\u0131z gerekir:<\/p>\n<pre><code class=\"language-bash\">npm install react-window\n<h2>veya<\/h2>\nyarn add react-window<\/code><\/pre>\n<p>Kurulum tamamland\u0131ktan sonra, <code>react-window<\/code>&#8216;un temel bile\u015fenlerini kullanmaya ba\u015flayabilirsiniz. K\u00fct\u00fcphane iki ana liste bile\u015feni sunar:<\/p>\n<p>*   <code>FixedSizeList<\/code>: T\u00fcm \u00f6\u011felerin sabit bir y\u00fcksekli\u011fe (dikey listeler i\u00e7in) veya geni\u015fli\u011fe (yatay listeler i\u00e7in) sahip oldu\u011fu durumlar i\u00e7in.<br \/>\n*   <code>VariableSizeList<\/code>: \u00d6\u011felerin de\u011fi\u015fken y\u00fcksekli\u011fe veya geni\u015fli\u011fe sahip oldu\u011fu durumlar i\u00e7in.<\/p>\n<p>Her iki bile\u015fen de benzer temel prop&#8217;lar\u0131 payla\u015f\u0131r:<\/p>\n<p>*   <code>height<\/code>: Listenin g\u00f6r\u00fcnen y\u00fcksekli\u011fi (piksel cinsinden).<br \/>\n*   <code>width<\/code>: Listenin g\u00f6r\u00fcnen geni\u015fli\u011fi (piksel cinsinden).<br \/>\n*   <code>itemCount<\/code>: Listedeki toplam \u00f6\u011fe say\u0131s\u0131.<br \/>\n*   <code>children<\/code>: Her bir liste \u00f6\u011fesini render edecek bir fonksiyon (render prop). Bu fonksiyona <code>index<\/code> (\u00f6\u011fenin dizini) ve <code>style<\/code> (\u00f6\u011fenin konumunu belirleyen stil nesnesi) prop&#8217;lar\u0131 iletilir.<br \/>\n*   <code>itemData<\/code> (iste\u011fe ba\u011fl\u0131): Liste \u00f6\u011felerine aktar\u0131lacak herhangi bir ek veri. Performans optimizasyonu i\u00e7in \u00f6nemlidir.<\/p>\n<p>\u015eimdi basit bir <code>FixedSizeList<\/code> \u00f6rne\u011fi ile ba\u015flayal\u0131m:<\/p>\n<pre><code class=\"language-jsx\">import React from 'react';\nimport { FixedSizeList } from 'react-window';\n\nconst Row = ({ index, style }) => (\n  <div style={style}>\n    Liste \u00d6\u011fesi {index}\n  <\/div>\n);\n\nconst MyFixedSizeList = () => (\n  <FixedSizeList\n    height={400} \/\/ Listenin g\u00f6r\u00fcnen y\u00fcksekli\u011fi\n    width={600}  \/\/ Listenin g\u00f6r\u00fcnen geni\u015fli\u011fi\n    itemCount={1000} \/\/ Toplam \u00f6\u011fe say\u0131s\u0131\n    itemSize={50}    \/\/ Her bir \u00f6\u011fenin y\u00fcksekli\u011fi (piksel)\n  >\n    {Row}\n  <\/FixedSizeList>\n);\n\nexport default MyFixedSizeList;<\/code><\/pre>\n<p>Bu \u00f6rnekte:<\/p>\n<p>*   <code>FixedSizeList<\/code> bile\u015feni, 400 piksel y\u00fcksekli\u011finde ve 600 piksel geni\u015fli\u011finde bir alan\u0131 kaplar.<br \/>\n*   <code>itemCount={1000}<\/code> ile 1000 adet liste \u00f6\u011fesi oldu\u011funu belirtiriz.<br \/>\n*   <code>itemSize={50}<\/code> ile her bir \u00f6\u011fenin y\u00fcksekli\u011finin 50 piksel oldu\u011funu tan\u0131mlar\u0131z.<br \/>\n*   <code>Row<\/code> bile\u015feni, <code>FixedSizeList<\/code>&#8216;in <code>children<\/code> prop&#8217;una ge\u00e7ilen bir render fonksiyonudur. <code>react-window<\/code> bu fonksiyona <code>index<\/code> (hangi \u00f6\u011fenin render edildi\u011fini belirtir) ve <code>style<\/code> (\u00f6\u011fenin DOM&#8217;daki do\u011fru konumunu ve boyutunu ayarlayan stil) prop&#8217;lar\u0131n\u0131 iletir. <strong>Bu <code>style<\/code> prop&#8217;unu kesinlikle \u00f6\u011fenize uygulamal\u0131s\u0131n\u0131z, aksi takdirde sanalizasyon \u00e7al\u0131\u015fmaz!<\/strong><\/p>\n<p>Bu kurulum ile, sadece birka\u00e7 \u00f6\u011fe DOM&#8217;a render edilirken, kullan\u0131c\u0131 1000 \u00f6\u011felik bir listede sorunsuz bir \u015fekilde kayd\u0131rma yapabilir.<\/p>\n<h3>FixedSizeList: Sabit Boyutlu \u00d6\u011feler \u0130\u00e7in<\/h3>\n<p><code>FixedSizeList<\/code>, ad\u0131ndan da anla\u015f\u0131laca\u011f\u0131 gibi, listedeki t\u00fcm \u00f6\u011felerin ayn\u0131 y\u00fcksekli\u011fe (dikey listeler i\u00e7in) veya geni\u015fli\u011fe (yatay listeler i\u00e7in) sahip oldu\u011fu senaryolar i\u00e7in tasarlanm\u0131\u015ft\u0131r. Bu, <code>react-window<\/code>&#8216;un en basit ve en performansl\u0131 kullan\u0131m \u015feklidir, \u00e7\u00fcnk\u00fc k\u00fct\u00fcphane her bir \u00f6\u011fenin konumunu ve boyutunu kolayca hesaplayabilir.<\/p>\n<p><strong>Kullan\u0131m Senaryolar\u0131:<\/strong><\/p>\n<p>*   <strong>Veri Tablolar\u0131:<\/strong> T\u00fcm sat\u0131rlar\u0131n ayn\u0131 y\u00fcksekli\u011fe sahip oldu\u011fu tablolar.<br \/>\n*   <strong>\u00dcr\u00fcn Listeleri:<\/strong> Her \u00fcr\u00fcn kart\u0131n\u0131n sabit bir boyuta sahip oldu\u011fu e-ticaret sitelerindeki listeler.<br \/>\n*   <strong>Ayarlar Men\u00fcleri:<\/strong> Sabit y\u00fckseklikteki men\u00fc \u00f6\u011feleri.<br \/>\n*   <strong>Basit Mesaj Listeleri:<\/strong> T\u00fcm mesajlar\u0131n ayn\u0131 y\u00fcksekli\u011fe sahip oldu\u011fu sohbet uygulamalar\u0131.<\/p>\n<p><strong>\u00d6nemli Prop:<\/strong><\/p>\n<p>*   <code>itemSize<\/code>: Bu prop, bir say\u0131 de\u011feri al\u0131r ve her bir \u00f6\u011fenin piksel cinsinden boyutunu (dikey listeler i\u00e7in y\u00fckseklik, yatay listeler i\u00e7in geni\u015flik) belirtir. Bu de\u011fer, <code>react-window<\/code>&#8216;un sanal kayd\u0131rma mekanizmas\u0131n\u0131 do\u011fru bir \u015fekilde olu\u015fturmas\u0131 i\u00e7in kritik \u00f6neme sahiptir.<\/p>\n<p><strong>\u00d6rnek Kod: Yatay Liste<\/strong><\/p>\n<p><code>FixedSizeList<\/code> varsay\u0131lan olarak dikey listeler olu\u015fturur. Yatay bir liste olu\u015fturmak i\u00e7in <code>layout=\"horizontal\"<\/code> prop&#8217;unu kullanman\u0131z yeterlidir. Bu durumda <code>itemSize<\/code> prop&#8217;u \u00f6\u011felerin geni\u015fli\u011fini belirleyecektir.<\/p>\n<pre><code class=\"language-jsx\">import React from 'react';\nimport { FixedSizeList } from 'react-window';\n\nconst Column = ({ index, style }) => (\n  <div\n    style={{\n      ...style,\n      display: 'flex',\n      alignItems: 'center',\n      justifyContent: 'center',\n      borderRight: '1px solid #eee',\n      backgroundColor: index % 2 ? '#f8f8f8' : 'white',\n    }}\n  >\n    S\u00fctun {index}\n  <\/div>\n);\n\nconst MyFixedSizeHorizontalList = () => (\n  <FixedSizeList\n    height={100} \/\/ Listenin g\u00f6r\u00fcnen y\u00fcksekli\u011fi\n    width={800}  \/\/ Listenin g\u00f6r\u00fcnen geni\u015fli\u011fi\n    itemCount={500} \/\/ Toplam \u00f6\u011fe say\u0131s\u0131\n    itemSize={150}    \/\/ Her bir \u00f6\u011fenin geni\u015fli\u011fi (piksel)\n    layout=\"horizontal\" \/\/ Yatay liste i\u00e7in\n  >\n    {Column}\n  <\/FixedSizeList>\n);\n\nexport default MyFixedSizeHorizontalList;<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>height<\/code> prop&#8217;u listenin y\u00fcksekli\u011fini (bu durumda sabittir), <code>width<\/code> prop&#8217;u ise yatay olarak ne kadar alan kaplayaca\u011f\u0131n\u0131 belirtir. <code>itemSize<\/code> bu sefer her bir s\u00fctunun geni\u015fli\u011fini temsil eder.<\/p>\n<p><strong>FixedSizeGrid:<\/strong><\/p>\n<p><code>react-window<\/code> ayr\u0131ca sabit boyutlu \u00f6\u011felerden olu\u015fan \u0131zgaralar (grid) i\u00e7in <code>FixedSizeGrid<\/code> bile\u015fenini sunar. Bu bile\u015fen, hem sat\u0131r hem de s\u00fctun boyutlar\u0131n\u0131n sabit oldu\u011fu durumlarda kullan\u0131l\u0131r ve <code>columnCount<\/code>, <code>columnWidth<\/code>, <code>rowCount<\/code>, <code>rowHeight<\/code> gibi ek prop&#8217;lar al\u0131r. Kullan\u0131m mant\u0131\u011f\u0131 <code>FixedSizeList<\/code>&#8216;e benzerdir ancak iki boyutludur.<\/p>\n<h3>VariableSizeList: De\u011fi\u015fken Boyutlu \u00d6\u011feler \u0130\u00e7in<\/h3>\n<p>Ger\u00e7ek d\u00fcnya uygulamalar\u0131nda, listelerdeki t\u00fcm \u00f6\u011felerin ayn\u0131 boyutta olmas\u0131 nadirdir. \u00d6rne\u011fin, bir sohbet uygulamas\u0131ndaki mesajlar farkl\u0131 uzunluklarda olabilir, bir haber ak\u0131\u015f\u0131ndaki makaleler farkl\u0131 resimler ve metin i\u00e7erikleri nedeniyle farkl\u0131 y\u00fcksekliklere sahip olabilir. Bu gibi durumlarda <code>FixedSizeList<\/code> yetersiz kal\u0131r, \u00e7\u00fcnk\u00fc her \u00f6\u011fenin boyutunu \u00f6nceden bilmez ve sabit bir <code>itemSize<\/code> de\u011feri atayamay\u0131z. \u0130\u015fte burada <code>VariableSizeList<\/code> devreye girer.<\/p>\n<p><code>VariableSizeList<\/code>, listedeki \u00f6\u011felerin farkl\u0131 boyutlara sahip olabilece\u011fi senaryolar i\u00e7in tasarlanm\u0131\u015ft\u0131r. Bu bile\u015fen, <code>itemSize<\/code> prop&#8217;unu bir say\u0131 yerine bir fonksiyon olarak al\u0131r.<\/p>\n<p><strong><code>itemSize<\/code> Prop&#8217;u Fonksiyon Olarak:<\/strong><\/p>\n<p><code>VariableSizeList<\/code> i\u00e7in <code>itemSize<\/code> prop&#8217;u, <code>index<\/code> parametresini alan ve o dizindeki \u00f6\u011fenin piksel cinsinden boyutunu d\u00f6nd\u00fcren bir fonksiyon olmal\u0131d\u0131r:<\/p>\n<pre><code class=\"language-jsx\">import React from 'react';\nimport { VariableSizeList } from 'react-window';\n\n\/\/ \u00d6rnek olarak, her \u00f6\u011fenin y\u00fcksekli\u011fi rastgele olsun\nconst getItemSize = index => (index % 3 === 0 ? 75 : 50); \/\/ Baz\u0131 \u00f6\u011feler 75px, baz\u0131lar\u0131 50px\n\nconst Row = ({ index, style }) => (\n  <div\n    style={{\n      ...style,\n      display: 'flex',\n      alignItems: 'center',\n      justifyContent: 'center',\n      borderBottom: '1px solid #eee',\n      backgroundColor: index % 2 ? '#f8f8f8' : 'white',\n    }}\n  >\n    De\u011fi\u015fken Boyutlu \u00d6\u011fesi {index} (Y\u00fckseklik: {getItemSize(index)}px)\n  <\/div>\n);\n\nconst MyVariableSizeList = () => (\n  <VariableSizeList\n    height={400}\n    width={600}\n    itemCount={1000}\n    itemSize={getItemSize} \/\/ itemSize art\u0131k bir fonksiyon!\n  >\n    {Row}\n  <\/VariableSizeList>\n);\n\nexport default MyVariableSizeList;<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>getItemSize<\/code> fonksiyonu her bir \u00f6\u011fenin dizinine g\u00f6re farkl\u0131 bir y\u00fckseklik d\u00f6nd\u00fcr\u00fcr. <code>react-window<\/code>, her \u00f6\u011fenin konumunu ve boyutunu dinamik olarak hesaplamak i\u00e7in bu fonksiyonu kullan\u0131r.<\/p>\n<p><strong>Performans Etkileri ve Optimizasyon:<\/strong><\/p>\n<p><code>itemSize<\/code> fonksiyonunun her render&#8217;da veya her kayd\u0131rma olay\u0131nda \u00e7a\u011fr\u0131lmas\u0131, \u00f6zellikle \u00e7ok b\u00fcy\u00fck listelerde performans sorunlar\u0131na yol a\u00e7abilir. E\u011fer \u00f6\u011fe boyutlar\u0131 de\u011fi\u015firse veya listenin i\u00e7eri\u011fi g\u00fcncellenirse, <code>react-window<\/code>&#8216;un bu boyutlar\u0131 yeniden hesaplamas\u0131 gerekir.<\/p>\n<p>*   <strong>\u00d6nbellekleme (Caching):<\/strong> Genellikle, <code>getItemSize<\/code> fonksiyonunun d\u00f6nd\u00fcrd\u00fc\u011f\u00fc de\u011ferler \u00f6nbelle\u011fe al\u0131n\u0131r. E\u011fer \u00f6\u011fe boyutlar\u0131 dinamik olarak de\u011fi\u015fmiyorsa (yani, bir kez hesapland\u0131ktan sonra sabit kal\u0131yorsa), bu de\u011ferleri bir dizi veya harita i\u00e7inde saklamak ve sadece gerekti\u011finde g\u00fcncellemek performans\u0131 art\u0131r\u0131r.<br \/>\n*   <strong><code>resetAfterIndex<\/code> Metodu:<\/strong> <code>VariableSizeList<\/code>&#8216;in bir <code>resetAfterIndex<\/code> metodu vard\u0131r. Bu metot, listenin boyutlar\u0131n\u0131n belirli bir dizinden sonra ge\u00e7ersiz oldu\u011funu ve yeniden hesaplanmas\u0131 gerekti\u011fini belirtmek i\u00e7in kullan\u0131l\u0131r. \u00d6rne\u011fin, bir \u00f6\u011fenin i\u00e7eri\u011fi de\u011fi\u015fti\u011finde ve y\u00fcksekli\u011fi farkl\u0131la\u015ft\u0131\u011f\u0131nda, bu metodu \u00e7a\u011f\u0131rarak k\u00fct\u00fcphaneyi bilgilendirebilirsiniz. Bu metot, <code>VariableSizeList<\/code> bile\u015feninin bir <code>ref<\/code>&#8216;i arac\u0131l\u0131\u011f\u0131yla \u00e7a\u011fr\u0131l\u0131r.<\/p>\n<pre><code class=\"language-jsx\">import React, { useRef, useCallback, useState } from 'react';\nimport { VariableSizeList } from 'react-window';\n\n\/\/ Her \u00f6\u011fenin y\u00fcksekli\u011fini dinamik olarak belirleyen bir fonksiyon\nconst itemHeights = new Array(1000)\n  .fill(true)\n  .map(() => 25 + Math.round(Math.random() * 50)); \/\/ Rastgele y\u00fckseklikler\n\nconst getItemSize = index => itemHeights[index];\n\nconst Row = ({ index, style }) => (\n  <div\n    style={{\n      ...style,\n      display: 'flex',\n      alignItems: 'center',\n      justifyContent: 'center',\n      borderBottom: '1px solid #eee',\n      backgroundColor: index % 2 ? '#f8f8f8' : 'white',\n    }}\n  >\n    \u00d6\u011fe {index} (Y\u00fckseklik: {getItemSize(index)}px)\n  <\/div>\n);\n\nconst MyVariableSizeListWithReset = () => {\n  const listRef = useRef();\n  const [dataVersion, setDataVersion] = useState(0); \/\/ Veri g\u00fcncellendi\u011finde tetiklemek i\u00e7in\n\n  const handleUpdateItemSize = useCallback((indexToUpdate) => {\n    \/\/ Belirli bir \u00f6\u011fenin y\u00fcksekli\u011fini g\u00fcncelleyelim\n    itemHeights[indexToUpdate] = 100; \/\/ \u00d6rnek olarak 100px yapal\u0131m\n    \n    \/\/ listRef.current'\u0131n var oldu\u011fundan emin olun\n    if (listRef.current) {\n      listRef.current.resetAfterIndex(indexToUpdate); \/\/ Bu indeksten sonras\u0131n\u0131 yeniden hesapla\n      setDataVersion(prev => prev + 1); \/\/ Component'i yeniden render etmeye zorla (opsiyonel)\n    }\n  }, []);\n\n  return (\n    <div>\n      <button onClick={() => handleUpdateItemSize(5)}>5. \u00d6\u011fenin Boyutunu G\u00fcncelle<\/button>\n      <VariableSizeList\n        ref={listRef} \/\/ Ref'i ata\n        height={400}\n        width={600}\n        itemCount={itemHeights.length}\n        itemSize={getItemSize}\n      >\n        {Row}\n      <\/VariableSizeList>\n    <\/div>\n  );\n};\n\nexport default MyVariableSizeListWithReset;<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>itemHeights<\/code> dizisi ile her \u00f6\u011fenin y\u00fcksekli\u011fini \u00f6nbelle\u011fe al\u0131yoruz. <code>handleUpdateItemSize<\/code> fonksiyonu, belirli bir \u00f6\u011fenin y\u00fcksekli\u011fini de\u011fi\u015ftirdi\u011finde <code>listRef.current.resetAfterIndex(indexToUpdate)<\/code> \u00e7a\u011fr\u0131s\u0131 yaparak <code>react-window<\/code>&#8216;u bilgilendirir. Bu, k\u00fct\u00fcphanenin sadece etkilenen b\u00f6lgedeki \u00f6\u011felerin boyutlar\u0131n\u0131 yeniden hesaplamas\u0131n\u0131 sa\u011flar, t\u00fcm listeyi de\u011fil.<\/p>\n<h3>Geli\u015fmi\u015f Kullan\u0131m Senaryolar\u0131 ve Optimizasyonlar<\/h3>\n<p><code>react-window<\/code>, temel listeleme yeteneklerinin \u00f6tesinde, daha karma\u015f\u0131k senaryolar ve performans optimizasyonlar\u0131 i\u00e7in \u00e7e\u015fitli ara\u00e7lar sunar.<\/p>\n<h4>Custom Scrollbar&#8217;lar ve Scroll Pozisyonu Kontrol\u00fc<\/h4>\n<p><code>react-window<\/code> taraf\u0131ndan olu\u015fturulan liste, taray\u0131c\u0131n\u0131n do\u011fal kayd\u0131rma \u00e7ubu\u011funu kullan\u0131r. Ancak bazen \u00f6zel bir kayd\u0131rma \u00e7ubu\u011fu tasar\u0131m\u0131na veya kayd\u0131rma pozisyonunu programatik olarak kontrol etme ihtiyac\u0131na sahip olabilirsiniz.<\/p>\n<p>*   <strong><code>outerRef<\/code> ve <code>innerRef<\/code>:<\/strong> <code>FixedSizeList<\/code> ve <code>VariableSizeList<\/code> bile\u015fenleri, liste kapsay\u0131c\u0131lar\u0131na referans alman\u0131z\u0131 sa\u011flayan <code>outerRef<\/code> ve <code>innerRef<\/code> prop&#8217;lar\u0131 sa\u011flar. <code>outerRef<\/code>, listenin kayd\u0131rma yapabilen d\u0131\u015f kapsay\u0131c\u0131s\u0131na (viewport), <code>innerRef<\/code> ise t\u00fcm liste \u00f6\u011felerini i\u00e7eren i\u00e7 kapsay\u0131c\u0131s\u0131na eri\u015fim sa\u011flar. Bu referanslar arac\u0131l\u0131\u011f\u0131yla DOM elemanlar\u0131na do\u011frudan eri\u015ferek kayd\u0131rma olaylar\u0131n\u0131 dinleyebilir veya \u00f6zel kayd\u0131rma \u00e7ubuklar\u0131 entegre edebilirsiniz.<\/p>\n<p>*   <strong><code>scrollToItem<\/code> ve <code>scrollTo<\/code> Metotlar\u0131:<\/strong> <code>listRef<\/code> arac\u0131l\u0131\u011f\u0131yla eri\u015febilece\u011finiz <code>scrollToItem(index, align)<\/code> metodu, belirli bir indeksteki \u00f6\u011feyi g\u00f6r\u00fcn\u00fcm alan\u0131na getirir. <code>align<\/code> parametresi (<code>\"auto\"<\/code>, <code>\"smart\"<\/code>, <code>\"center\"<\/code>, <code>\"end\"<\/code>, <code>\"start\"<\/code>) \u00f6\u011fenin nas\u0131l hizalanaca\u011f\u0131n\u0131 belirler. <code>scrollTo(scrollOffset)<\/code> metodu ise listeyi belirli bir kayd\u0131rma ofsetine ta\u015f\u0131r.<\/p>\n<pre><code class=\"language-jsx\">import React, { useRef } from 'react';\nimport { FixedSizeList } from 'react-window';\n\nconst Row = ({ index, style }) => (\n  <div style={{ ...style, lineHeight: '50px', borderBottom: '1px solid #eee' }}>\n    \u00d6\u011fe {index}\n  <\/div>\n);\n\nconst ScrollControlList = () => {\n  const listRef = useRef();\n\n  const scrollToMiddle = () => {\n    if (listRef.current) {\n      listRef.current.scrollToItem(500, 'center'); \/\/ 500. \u00f6\u011feyi ortaya hizala\n    }\n  };\n\n  const scrollToTop = () => {\n    if (listRef.current) {\n      listRef.current.scrollTo(0); \/\/ En ba\u015fa kayd\u0131r\n    }\n  };\n\n  return (\n    <div>\n      <button onClick={scrollToMiddle}>500. \u00d6\u011feye Kayd\u0131r<\/button>\n      <button onClick={scrollToTop}>En Ba\u015fa Kayd\u0131r<\/button>\n      <FixedSizeList\n        ref={listRef}\n        height={300}\n        width={400}\n        itemCount={1000}\n        itemSize={50}\n      >\n        {Row}\n      <\/FixedSizeList>\n    <\/div>\n  );\n};\n\nexport default ScrollControlList;<\/code><\/pre>\n<h4>Veri Y\u00f6netimi ve <code>itemData<\/code> Prop&#8217;u<\/h4>\n<p>Liste \u00f6\u011felerinize veri aktar\u0131rken, <code>itemData<\/code> prop&#8217;unu kullanmak \u00f6nemlidir. Render prop&#8217;unuz (yani <code>Row<\/code> bile\u015feniniz) genellikle kapatma (closure) ile listeyi \u00e7evreleyen bile\u015fenin kapsam\u0131ndaki verilere eri\u015febilir. Ancak, bu durum gereksiz yeniden render&#8217;lara yol a\u00e7abilir.<\/p>\n<p>E\u011fer listeyi \u00e7evreleyen bile\u015fen her render edildi\u011finde yeni bir <code>data<\/code> dizisi olu\u015fturulursa, render prop&#8217;u da her seferinde yeniden olu\u015fturulur. React, bu yeni fonksiyon referans\u0131n\u0131 alg\u0131lad\u0131\u011f\u0131nda, <code>FixedSizeList<\/code> veya <code>VariableSizeList<\/code>&#8216;in i\u00e7indeki t\u00fcm \u00f6\u011feleri yeniden render etmeye zorlayabilir, bu da performans\u0131 d\u00fc\u015f\u00fcr\u00fcr.<\/p>\n<p><code>itemData<\/code> prop&#8217;u, listenin her bir \u00f6\u011fesine de\u011fi\u015fmeyecek bir referansla veri aktarman\u0131n g\u00fcvenli bir yoludur. <code>itemData<\/code>&#8216;ya aktard\u0131\u011f\u0131n\u0131z de\u011fer, render prop&#8217;unuza <code>itemData<\/code> ad\u0131nda bir prop olarak iletilir. E\u011fer <code>itemData<\/code> referans\u0131 de\u011fi\u015fmezse, <code>react-window<\/code>&#8216;un i\u00e7 optimizasyonlar\u0131 sayesinde alt \u00f6\u011feler gereksiz yere yeniden render edilmez.<\/p>\n<pre><code class=\"language-jsx\">import React from 'react';\nimport { FixedSizeList } from 'react-window';\n\nconst allItems = Array.from({ length: 1000 }, (_, i) => ({\n  id: i,\n  name: <code>Kullan\u0131c\u0131 ${i}<\/code>,\n  description: <code>Bu, ${i}. kullan\u0131c\u0131n\u0131n a\u00e7\u0131klamas\u0131d\u0131r.<\/code>,\n}));\n\n\/\/ itemData prop'unu alan bir render prop\nconst Item = ({ index, style, data }) => {\n  const item = data[index]; \/\/ itemData'dan verilere eri\u015fim\n  return (\n    <div style={{ ...style, lineHeight: '50px', borderBottom: '1px solid #eee' }}>\n      <strong>{item.name}<\/strong> - {item.description}\n    <\/div>\n  );\n};\n\nconst MyListWithItemData = () => (\n  <FixedSizeList\n    height={300}\n    width={500}\n    itemCount={allItems.length}\n    itemSize={50}\n    itemData={allItems} \/\/ Veri dizisini itemData olarak ge\u00e7ir\n  >\n    {Item}\n  <\/FixedSizeList>\n);\n\nexport default MyListWithItemData;<\/code><\/pre>\n<p>Bu yakla\u015f\u0131m, <code>allItems<\/code> dizisi de\u011fi\u015fmedi\u011fi s\u00fcrece <code>FixedSizeList<\/code>&#8216;in ve <code>Item<\/code> bile\u015fenlerinin gereksiz yere yeniden render edilmesini engeller.<\/p>\n<h4>Liste \u0130\u00e7indeki \u00d6\u011felerin Yeniden Render Edilmesi<\/h4>\n<p><code>react-window<\/code>&#8216;un kendisi, sadece g\u00f6r\u00fcn\u00fcr \u00f6\u011feleri render ederek ve \u00f6\u011fe yeniden kullan\u0131m\u0131 yaparak \u00f6nemli optimizasyonlar sa\u011flar. Ancak, render prop&#8217;unuzun i\u00e7inde olu\u015fturdu\u011funuz bireysel liste \u00f6\u011felerinin (\u00f6rne\u011fin, <code>Row<\/code> veya <code>Item<\/code> bile\u015fenleri) de kendi i\u00e7lerinde optimize edilmesi gerekebilir.<\/p>\n<p>E\u011fer bir \u00f6\u011fe bile\u015feniniz karma\u015f\u0131k mant\u0131k i\u00e7eriyor ve prop&#8217;lar\u0131 de\u011fi\u015fmedi\u011fi halde yeniden render ediliyorsa, <code>React.memo<\/code> kullanarak bu \u00f6\u011feleri sarmalayabilirsiniz. Bu, \u00f6\u011fenin prop&#8217;lar\u0131 de\u011fi\u015fmedi\u011fi s\u00fcrece yeniden render edilmesini engeller.<\/p>\n<pre><code class=\"language-jsx\">import React from 'react';\nimport { FixedSizeList } from 'react-window';\n\nconst allItems = Array.from({ length: 1000 }, (_, i) => <code>\u00d6\u011fe ${i}<\/code>);\n\n\/\/ React.memo ile sarmalanm\u0131\u015f optimize edilmi\u015f \u00f6\u011fe bile\u015feni\nconst MemoizedRow = React.memo(({ index, style, data }) => {\n  const item = data[index];\n  return (\n    <div style={{ ...style, lineHeight: '50px', borderBottom: '1px solid #eee' }}>\n      {item}\n    <\/div>\n  );\n});\n\nconst OptimizedList = () => (\n  <FixedSizeList\n    height={300}\n    width={500}\n    itemCount={allItems.length}\n    itemSize={50}\n    itemData={allItems}\n  >\n    {MemoizedRow} {\/<em> Memoized bile\u015feni kullan <\/em>\/}\n  <\/FixedSizeList>\n);\n\nexport default OptimizedList;<\/code><\/pre>\n<h4>Y\u00fckleme Durumlar\u0131 (Loading States) ve Sonsuz Kayd\u0131rma (Infinite Scroll)<\/h4>\n<p>B\u00fcy\u00fck listeler genellikle t\u00fcm veriyi bir kerede y\u00fcklemez. Bunun yerine, kullan\u0131c\u0131 kayd\u0131rd\u0131k\u00e7a daha fazla veri y\u00fcklenen &#8220;sonsuz kayd\u0131rma&#8221; desenini kullan\u0131rlar. <code>react-window<\/code> bu deseni do\u011frudan sa\u011flamasa da, kolayca entegre edilebilir.<\/p>\n<p>*   <strong>Y\u00fckleme Durumu G\u00f6sterimi:<\/strong> Listenin sonuna yakla\u015f\u0131ld\u0131\u011f\u0131nda, <code>itemCount<\/code> de\u011ferini ge\u00e7ici olarak art\u0131rarak bir &#8220;y\u00fckleniyor&#8221; veya &#8220;daha fazla y\u00fckle&#8221; g\u00f6stergesi ekleyebilirsiniz.<br \/>\n*   <strong>Veri Y\u00fckleme Mant\u0131\u011f\u0131:<\/strong> <code>onScroll<\/code> prop&#8217;unu kullanarak kayd\u0131rma olaylar\u0131n\u0131 dinleyebilir ve kullan\u0131c\u0131n\u0131n listenin sonuna yakla\u015f\u0131p yakla\u015fmad\u0131\u011f\u0131n\u0131 kontrol edebilirsiniz. Yakla\u015ft\u0131\u011f\u0131nda, bir API \u00e7a\u011fr\u0131s\u0131 yaparak daha fazla veri y\u00fckleyebilirsiniz.<\/p>\n<pre><code class=\"language-jsx\">import React, { useState, useEffect, useCallback } from 'react';\nimport { FixedSizeList } from 'react-window';\n\nconst LOADING = 1;\nconst LOADED = 2;\nconst itemStatusMap = {}; \/\/ Her \u00f6\u011fenin y\u00fcklenme durumunu tutmak i\u00e7in\n\nconst isItemLoaded = index => !!itemStatusMap[index];\nconst loadMoreItems = (startIndex, stopIndex) => {\n  for (let i = startIndex; i <= stopIndex; i++) {\n    itemStatusMap[i] = LOADING;\n  }\n  return new Promise(resolve =>\n    setTimeout(() => {\n      for (let i = startIndex; i <= stopIndex; i++) {\n        itemStatusMap[i] = LOADED;\n      }\n      resolve();\n    }, 1000)\n  );\n};\n\nconst Row = ({ index, style }) => {\n  let content;\n  if (!isItemLoaded(index)) {\n    content = 'Y\u00fckleniyor...';\n  } else {\n    content = <code>\u00d6\u011fe ${index}<\/code>;\n  }\n  return (\n    <div style={{ ...style, lineHeight: '50px', borderBottom: '1px solid #eee' }}>\n      {content}\n    <\/div>\n  );\n};\n\nconst InfiniteScrollList = () => {\n  const [itemCount, setItemCount] = useState(0); \/\/ Ba\u015flang\u0131\u00e7ta 0 \u00f6\u011fe\n  const [loading, setLoading] = useState(false);\n\n  useEffect(() => {\n    \/\/ \u0130lk y\u00fckleme\n    setLoading(true);\n    loadMoreItems(0, 19).then(() => {\n      setItemCount(20);\n      setLoading(false);\n    });\n  }, []);\n\n  const handleScroll = useCallback(({ scrollOffset, scrollHeight, clientHeight }) => {\n    \/\/ Listenin sonuna yak\u0131n m\u0131?\n    const threshold = 100; \/\/ Son 100 piksel kala y\u00fcklemeye ba\u015fla\n    if (!loading && scrollOffset + clientHeight >= scrollHeight - threshold && itemCount < 1000) {\n      setLoading(true);\n      const startIndex = itemCount;\n      const stopIndex = Math.min(itemCount + 19, 999); \/\/ Bir sonraki 20 \u00f6\u011feyi y\u00fckle\n      loadMoreItems(startIndex, stopIndex).then(() => {\n        setItemCount(prevCount => prevCount + (stopIndex - startIndex + 1));\n        setLoading(false);\n      });\n    }\n  }, [loading, itemCount]);\n\n  return (\n    <FixedSizeList\n      height={300}\n      width={500}\n      itemCount={itemCount + (loading ? 1 : 0)} \/\/ Y\u00fckleniyor g\u00f6stergesi i\u00e7in 1 \u00f6\u011fe daha ekle\n      itemSize={50}\n      onScroll={handleScroll}\n    >\n      {Row}\n    <\/FixedSizeList>\n  );\n};\n\nexport default InfiniteScrollList;<\/code><\/pre>\n<p>Bu \u00f6rnek biraz basitle\u015ftirilmi\u015f olsa da, <code>onScroll<\/code> ile kayd\u0131rma pozisyonunu izleyerek ve <code>itemCount<\/code>&#8216;u dinamik olarak g\u00fcncelleyerek sonsuz kayd\u0131rma mant\u0131\u011f\u0131n\u0131 nas\u0131l uygulayabilece\u011finizi g\u00f6sterir. Y\u00fckleme durumunu belirtmek i\u00e7in <code>itemCount<\/code>&#8216;a ge\u00e7ici olarak bir \u00f6\u011fe daha eklenir ve bu \u00f6\u011fe &#8220;Y\u00fckleniyor&#8230;&#8221; mesaj\u0131n\u0131 g\u00f6sterir.<\/p>\n<h4>Dinamik Liste Boyutlar\u0131 (Responsive Lists)<\/h4>\n<p><code>react-window<\/code>&#8216;un <code>height<\/code> ve <code>width<\/code> prop&#8217;lar\u0131 sabit de\u011ferler bekler. Ancak, listenizin kapsay\u0131c\u0131 eleman\u0131n\u0131n boyutunun de\u011fi\u015fti\u011fi (\u00f6rne\u011fin, pencere yeniden boyutland\u0131r\u0131ld\u0131\u011f\u0131nda) duyarl\u0131 (responsive) bir tasar\u0131m\u0131n\u0131z varsa, bu de\u011ferleri dinamik olarak ayarlaman\u0131z gerekir.<\/p>\n<p>Bu durumu y\u00f6netmek i\u00e7in genellikle <code>react-window-autosizer<\/code> gibi yard\u0131mc\u0131 k\u00fct\u00fcphaneler veya taray\u0131c\u0131n\u0131n <code>ResizeObserver<\/code> API&#8217;si kullan\u0131l\u0131r.<\/p>\n<p>*   <strong><code>react-window-autosizer<\/code>:<\/strong> Bu k\u00fc\u00e7\u00fck k\u00fct\u00fcphane, bir React bile\u015feninin kapsay\u0131c\u0131 eleman\u0131n\u0131n boyutunu otomatik olarak alg\u0131lar ve bu boyutlar\u0131 <code>width<\/code> ve <code>height<\/code> prop&#8217;lar\u0131 olarak <code>react-window<\/code> listesine iletir.<\/p>\n<pre><code class=\"language-jsx\">import React from 'react';\nimport { FixedSizeList } from 'react-window';\nimport AutoSizer from 'react-virtualized-auto-sizer'; \/\/ react-window-autosizer yerine react-virtualized-auto-sizer daha yayg\u0131n kullan\u0131l\u0131yor\n\nconst Row = ({ index, style }) => (\n  <div style={{ ...style, lineHeight: '50px', borderBottom: '1px solid #eee' }}>\n    \u00d6\u011fe {index}\n  <\/div>\n);\n\nconst ResponsiveList = () => (\n  <div style={{ width: '100%', height: '500px' }}> {\/<em> Kapsay\u0131c\u0131ya boyut verin <\/em>\/}\n    <AutoSizer>\n      {({ height, width }) => (\n        <FixedSizeList\n          height={height} \/\/ AutoSizer'dan gelen y\u00fcksekli\u011fi kullan\n          width={width}   \/\/ AutoSizer'dan gelen geni\u015fli\u011fi kullan\n          itemCount={1000}\n          itemSize={50}\n        >\n          {Row}\n        <\/FixedSizeList>\n      )}\n    <\/AutoSizer>\n  <\/div>\n);\n\nexport default ResponsiveList;<\/code><\/pre>\n<p><code>AutoSizer<\/code> bile\u015feni, <code>FixedSizeList<\/code>&#8216;i \u00e7evreler ve render prop&#8217;u arac\u0131l\u0131\u011f\u0131yla kendisine ayr\u0131lan alan\u0131 <code>height<\/code> ve <code>width<\/code> olarak iletir. Bu, listenizin kapsay\u0131c\u0131s\u0131n\u0131n boyutuna g\u00f6re otomatik olarak ayarlanmas\u0131n\u0131 sa\u011flar.<\/p>\n<h3>react-window ile Birlikte Kullan\u0131labilecek K\u00fct\u00fcphaneler<\/h3>\n<p><code>react-window<\/code> tek ba\u015f\u0131na g\u00fc\u00e7l\u00fc olsa da, ek i\u015flevsellik veya entegrasyonlar i\u00e7in baz\u0131 yard\u0131mc\u0131 k\u00fct\u00fcphanelerle birlikte kullan\u0131lmas\u0131 yayg\u0131nd\u0131r:<\/p>\n<p>*   <strong><code>react-virtualized-auto-sizer<\/code>:<\/strong> Yukar\u0131da bahsedildi\u011fi gibi, listenin boyutunu kapsay\u0131c\u0131 eleman\u0131na g\u00f6re otomatik olarak ayarlamak i\u00e7in kullan\u0131l\u0131r. <code>react-window<\/code>&#8216;un kendi <code>react-window-autosizer<\/code> paketi de mevcut olsa da, <code>react-virtualized<\/code>&#8216;\u0131n daha olgun <code>AutoSizer<\/code>&#8216;\u0131 genellikle tercih edilir.<br \/>\n*   <strong><code>react-infinite-scroll-component<\/code>:<\/strong> Sonsuz kayd\u0131rma i\u015flevselli\u011fini daha kolay entegre etmek i\u00e7in kullan\u0131labilir. <code>react-window<\/code>&#8216;un <code>onScroll<\/code> prop&#8217;u ile manuel olarak y\u00f6netmek yerine, bu k\u00fct\u00fcphane daha soyut bir API sunar. Ancak, <code>react-window<\/code>&#8216;un sanalizasyon mekanizmas\u0131 ile tam uyumluluk i\u00e7in dikkatli entegrasyon gerektirir.<br \/>\n*   <strong><code>react-intersection-observer<\/code>:<\/strong> Belirli \u00f6\u011felerin (\u00f6rne\u011fin, listenin sonundaki bir y\u00fckleme g\u00f6stergesi) g\u00f6r\u00fcn\u00fcm alan\u0131na girip girmedi\u011fini tespit etmek i\u00e7in kullan\u0131labilir. Bu, sonsuz kayd\u0131rma tetikleyicilerini y\u00f6netmek i\u00e7in <code>onScroll<\/code>&#8216;dan daha modern ve performansl\u0131 bir alternatif olabilir.<\/p>\n<h3>react-window&#8217;un S\u0131n\u0131rl\u0131l\u0131klar\u0131 ve Alternatifler<\/h3>\n<p><code>react-window<\/code> hafifli\u011fi ve performans\u0131 ile \u00f6ne \u00e7\u0131ksa da, her senaryo i\u00e7in m\u00fckemmel bir \u00e7\u00f6z\u00fcm de\u011fildir. Baz\u0131 s\u0131n\u0131rlamalar\u0131 vard\u0131r:<\/p>\n<p>*   <strong>Tek Boyutlu Sanalizasyon:<\/strong> <code>react-window<\/code> temel olarak dikey veya yatay listeler ve basit \u0131zgaralar i\u00e7in tasarlanm\u0131\u015ft\u0131r. Karma\u015f\u0131k, \u00e7ok boyutlu veya dinamik olarak yerle\u015ftirilmi\u015f \u00f6\u011feler i\u00e7eren (\u00f6rne\u011fin, Pinterest tarz\u0131 &#8220;masonry&#8221; layout&#8217;lar) listeleri do\u011frudan desteklemez.<br \/>\n*   <strong>\u00d6\u011fe Konumu D\u0131\u015f\u0131 Etkile\u015fimler:<\/strong> \u00d6\u011felerin konumunu veya boyutunu etkileyecek d\u0131\u015f de\u011fi\u015fiklikler (\u00f6rne\u011fin, CSS ile bir \u00f6\u011fenin <code>margin<\/code> veya <code>padding<\/code> de\u011ferinin de\u011fi\u015fmesi), <code>react-window<\/code>&#8216;un dahili hesaplamalar\u0131n\u0131 bozabilir. Bu t\u00fcr durumlarda <code>resetAfterIndex<\/code> gibi y\u00f6ntemlerle manuel olarak k\u00fct\u00fcphaneyi bilgilendirmek gerekebilir.<br \/>\n*   <strong>Karma\u015f\u0131k Ba\u015fl\u0131k\/Altl\u0131k Yap\u0131lar\u0131:<\/strong> Liste i\u00e7inde sabit ba\u015fl\u0131klar veya altl\u0131klar gibi karma\u015f\u0131k yap\u0131lar\u0131 do\u011frudan desteklemez. Bu t\u00fcr durumlar i\u00e7in ek DOM \u00f6\u011feleri veya \u00f6zel bile\u015fenler kullanman\u0131z gerekebilir.<\/p>\n<p><strong>Alternatifler:<\/strong><\/p>\n<p>*   <strong><code>react-virtualized<\/code>:<\/strong> <code>react-window<\/code>&#8216;un daha kapsaml\u0131 ve \u00f6zellik zengini \u00f6nc\u00fcl\u00fcd\u00fcr. Daha fazla bile\u015fen (\u00f6rne\u011fin, <code>Table<\/code>, <code>Collection<\/code>, <code>Masonry<\/code>) ve daha geli\u015fmi\u015f \u00f6zellikler sunar. Ancak, boyutu daha b\u00fcy\u00fckt\u00fcr ve API&#8217;si <code>react-window<\/code>&#8216;a g\u00f6re biraz daha karma\u015f\u0131kt\u0131r. E\u011fer <code>react-window<\/code>&#8216;un s\u0131n\u0131rlamalar\u0131na tak\u0131l\u0131yorsan\u0131z ve daha fazla esnekli\u011fe ihtiyac\u0131n\u0131z varsa, <code>react-virtualized<\/code> iyi bir se\u00e7enek olabilir.<br \/>\n*   <strong>\u00d6zel \u00c7\u00f6z\u00fcmler:<\/strong> \u00c7ok \u00f6zel ve ni\u015f sanalizasyon ihtiya\u00e7lar\u0131n\u0131z varsa, kendi sanalizasyon mant\u0131\u011f\u0131n\u0131z\u0131 s\u0131f\u0131rdan yazman\u0131z gerekebilir. Ancak bu, \u00f6nemli bir geli\u015ftirme \u00e7abas\u0131 ve bak\u0131m maliyeti gerektirir.<br \/>\n*   <strong>Taray\u0131c\u0131 Yerel Sanalizasyon (Gelecek):<\/strong> Web standartlar\u0131 geli\u015ftiricileri, taray\u0131c\u0131lara yerel sanalizasyon yetenekleri getirmek i\u00e7in \u00e7al\u0131\u015fmaktad\u0131r. Bu, gelecekte k\u00fct\u00fcphanelere olan ihtiyac\u0131 azaltabilir.<\/p>\n<h3>Sonu\u00e7 ve En \u0130yi Uygulamalar<\/h3>\n<p><code>react-window<\/code>, b\u00fcy\u00fck listeleri verimli bir \u015fekilde render etmek i\u00e7in React uygulamalar\u0131nda olmazsa olmaz bir ara\u00e7t\u0131r. Hafif yap\u0131s\u0131, basit API&#8217;si ve \u00fcst\u00fcn performans\u0131yla, kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirebilir.<\/p>\n<p><strong>Ne Zaman <code>react-window<\/code> Kullanmal\u0131y\u0131z?<\/strong><\/p>\n<p>*   Uygulaman\u0131zda binlerce veya on binlerce \u00f6\u011feden olu\u015fan listeler veya \u0131zgaralar varsa.<br \/>\n*   Bu listelerin kayd\u0131rma performans\u0131ndan \u015fikayet ediyorsan\u0131z.<br \/>\n*   \u00d6\u011fe boyutlar\u0131 sabit veya \u00f6nceden hesaplanabilirse (<code>FixedSizeList<\/code>).<br \/>\n*   \u00d6\u011fe boyutlar\u0131 de\u011fi\u015fken ancak her \u00f6\u011fe i\u00e7in kolayca hesaplanabilirse (<code>VariableSizeList<\/code>).<\/p>\n<p><strong>Performans \u0130pu\u00e7lar\u0131 ve En \u0130yi Uygulamalar:<\/strong><\/p>\n<p>1.  <strong><code>itemData<\/code> Kullan\u0131n:<\/strong> Verilerinizi <code>itemData<\/code> prop&#8217;u arac\u0131l\u0131\u011f\u0131yla ge\u00e7irin. Bu, render prop&#8217;unuzun gereksiz kapan\u0131\u015f (closure) sorunlar\u0131ndan ka\u00e7\u0131nmas\u0131n\u0131 ve <code>react-window<\/code>&#8216;un i\u00e7 optimizasyonlar\u0131n\u0131 daha etkili kullanmas\u0131n\u0131 sa\u011flar.<br \/>\n2.  <strong><code>React.memo<\/code> ile \u00d6\u011feleri Optimize Edin:<\/strong> Liste \u00f6\u011feleriniz karma\u015f\u0131k bile\u015fenlerse, <code>React.memo<\/code> ile sarmalayarak prop&#8217;lar\u0131 de\u011fi\u015fmedi\u011fi s\u00fcrece yeniden render edilmelerini engelleyin.<br \/>\n3.  <strong>Do\u011fru <code>itemSize<\/code> De\u011ferini Belirleyin:<\/strong> <code>FixedSizeList<\/code> i\u00e7in do\u011fru <code>itemSize<\/code> de\u011ferini, <code>VariableSizeList<\/code> i\u00e7in ise m\u00fcmk\u00fcn oldu\u011funca verimli \u00e7al\u0131\u015fan bir <code>getItemSize<\/code> fonksiyonunu kullan\u0131n. <code>getItemSize<\/code> i\u00e7inde pahal\u0131 hesaplamalardan ka\u00e7\u0131n\u0131n ve boyutlar\u0131 \u00f6nbelle\u011fe almay\u0131 d\u00fc\u015f\u00fcn\u00fcn.<br \/>\n4.  <strong><code>resetAfterIndex<\/code>&#8216;i Ak\u0131ll\u0131ca Kullan\u0131n:<\/strong> <code>VariableSizeList<\/code>&#8216;te bir \u00f6\u011fenin boyutu de\u011fi\u015fti\u011finde, sadece etkilenen b\u00f6l\u00fcm\u00fc yeniden hesaplamak i\u00e7in <code>resetAfterIndex<\/code> metodunu kullan\u0131n.<br \/>\n5.  <strong>Gereksiz Render&#8217;lardan Ka\u00e7\u0131n\u0131n:<\/strong> Listenizi \u00e7evreleyen bile\u015fenin s\u0131k s\u0131k yeniden render edilmedi\u011finden emin olun. <code>React.memo<\/code> veya <code>useCallback<\/code>\/<code>useMemo<\/code> hook&#8217;lar\u0131n\u0131 kullanarak performans\u0131 art\u0131rabilirsiniz.<br \/>\n6.  <strong>Eri\u015filebilirlik (Accessibility):<\/strong> Sanal listeler eri\u015filebilirlik a\u00e7\u0131s\u0131ndan baz\u0131 zorluklar \u00e7\u0131karabilir. Klavye navigasyonu ve ekran okuyucular\u0131n do\u011fru \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flamak i\u00e7in <code>tabIndex<\/code> gibi HTML \u00f6zelliklerini ve ARIA rollerini do\u011fru bir \u015fekilde kullanmaya \u00f6zen g\u00f6sterin.<\/p>\n<p><code>react-window<\/code>&#8216;u uygulaman\u0131za entegre ederek, kullan\u0131c\u0131lar\u0131n\u0131za daha ak\u0131c\u0131, daha h\u0131zl\u0131 ve daha keyifli bir deneyim sunabilir, ayn\u0131 zamanda geli\u015ftirme s\u00fcrecinizi basitle\u015ftirebilirsiniz. B\u00fcy\u00fck veri k\u00fcmeleriyle \u00e7al\u0131\u015f\u0131rken performans sorunlar\u0131yla bo\u011fu\u015fmak yerine, <code>react-window<\/code> ile bu sorunlar\u0131 zarif\u00e7e a\u015fabilirsiniz.<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"react-window ile Tan\u0131\u015fmak: B\u00fcy\u00fck Listeleri Verimli Bir \u015eekilde Olu\u015fturma K\u0131lavuzu\nModern web uygulamalar\u0131, kullan\u0131c\u0131lar\u0131na zengin ve dinam","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":[128],"tags":[],"class_list":{"0":"post-38981","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-react","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) - 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