{"id":28413,"date":"2025-08-29T10:00:22","date_gmt":"2025-08-29T07:00:22","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/angularda-viewchildin-cok-yuzlu-yapisi-read-parametresi\/"},"modified":"2025-08-29T10:00:22","modified_gmt":"2025-08-29T07:00:22","slug":"angularda-viewchildin-cok-yuzlu-yapisi-read-parametresi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/angularda-viewchildin-cok-yuzlu-yapisi-read-parametresi\/","title":{"rendered":"Angular&#8217;da viewChild&#8217;\u0131n \u00c7ok Y\u00fczl\u00fc Yap\u0131s\u0131: read Parametresi"},"content":{"rendered":"<p>Angular&#039;da viewChild&#039;\u0131n \u00c7ok Y\u00fczl\u00fc Yap\u0131s\u0131: read Parametresi<\/p>\n<p>Angular&#039;da bile\u015fenler aras\u0131 ileti\u015fimi sa\u011flayan g\u00fc\u00e7l\u00fc bir ara\u00e7 olan <code>@ViewChild<\/code> dekorat\u00f6r\u00fc,  <code>read<\/code> parametresiyle birlikte beklenmedik esneklik sunar.  Bu makalede, <code>read<\/code> parametresi sayesinde <code>@ViewChild<\/code>&#039;\u0131n farkl\u0131 kullan\u0131m senaryolar\u0131n\u0131,  basitten ileri seviyelere do\u011fru ad\u0131m ad\u0131m ele alaca\u011f\u0131z.  Angular&#039;da bile\u015fenlerinizin derinliklerine inerek, performans\u0131n\u0131z\u0131 art\u0131racak ve kodunuzun okunabilirli\u011fini iyile\u015ftirecek y\u00f6ntemleri ke\u015ffedeceksiniz. Haz\u0131rsan\u0131z, Angular&#039;\u0131n bu gizli g\u00fcc\u00fcn\u00fc birlikte ortaya \u00e7\u0131karal\u0131m!<\/p>\n<h2>Angular&#039;da @ViewChild Nedir? Temel Kavramlar<\/h2>\n<p>\u00d6ncelikle,  <code>@ViewChild<\/code> dekorat\u00f6r\u00fcn\u00fcn temel i\u015flevini anlamak gerekiyor.  Bu dekorat\u00f6r, bir bile\u015fenin \u015fablonunda bulunan bir \u00f6\u011feyi (\u00f6rne\u011fin, bir input, bir div veya ba\u015fka bir bile\u015fen) referans alman\u0131z\u0131 sa\u011flar.  B\u00f6ylece, bile\u015feninizin JavaScript kodundan bu \u00f6\u011fenin \u00f6zelliklerine eri\u015febilir ve bunlar\u0131 de\u011fi\u015ftirebilirsiniz.  Ancak, varsay\u0131lan olarak <code>@ViewChild<\/code>, \u00f6\u011fenin kendisini (referans\u0131n\u0131) d\u00f6nd\u00fcr\u00fcr.  \u0130\u015fte burada <code>read<\/code> parametresi devreye giriyor.  <code>read<\/code> parametresi, <code>@ViewChild<\/code>&#039;\u0131n hangi veriyi d\u00f6nd\u00fcrece\u011fini belirlemenizi sa\u011flar.  Bu,  \u00f6\u011fenin kendisinden farkl\u0131 bir \u015feyi, \u00f6rne\u011fin \u00f6\u011fenin bir \u00f6zelli\u011fini veya bile\u015feninin bir servisini d\u00f6nd\u00fcrmenize olanak tan\u0131r.<\/p>\n<p>Basit bir \u00f6rnek olarak, bir input eleman\u0131n\u0131 referans alal\u0131m:<\/p>\n<p><\/code>typescript<br \/>\nimport { Component, ViewChild, ElementRef } from &#8216;@angular\/core&#8217;;<\/p>\n<p>@Component({<br \/>\n  selector: &#8216;app-my-component&#8217;,<br \/>\n  template: <code><input #myInput type=\"text\"><br \/>\n    <button (click)=\"getValue()\">De\u011feri Al<\/button><\/code><br \/>\n})<br \/>\nexport class MyComponent {<br \/>\n  @ViewChild(&#8216;myInput&#8217;) myInput!: ElementRef;<\/p>\n<p>  getValue() {<br \/>\n    console.log(this.myInput.nativeElement.value);<br \/>\n  }<br \/>\n}<\/p>\n<pre><code class=\"language-plaintext\"><p>Bu \u00f6rnekte, <code>@ViewChild(&#039;myInput&#039;)<\/code>,  &#039;myInput&#039; adl\u0131 input eleman\u0131n\u0131n bir <code>ElementRef<\/code>&#039;ini d\u00f6nd\u00fcr\u00fcr.  <code>nativeElement<\/code> \u00f6zelli\u011fi sayesinde input eleman\u0131n\u0131n DOM elementine eri\u015febiliriz.<\/p>\n\n\n<h2>@ViewChild ve read Parametresi:  Nas\u0131l Kullan\u0131l\u0131r?<\/h2>\n\n<p><code>read<\/code> parametresi, <code>@ViewChild<\/code>&#039;\u0131n  ger\u00e7ek g\u00fcc\u00fcn\u00fc ortaya \u00e7\u0131karan k\u0131s\u0131md\u0131r.  Bu parametreyi kullanarak,  \u00f6\u011fenin kendisinden farkl\u0131 bir \u015feyi d\u00f6nd\u00fcrebiliriz.  \u00d6rne\u011fin, bir bile\u015fen i\u00e7indeki bir servisi referans almak isteyebiliriz.  <code>read<\/code> parametresi, bu durumda servisin tipini belirtir.<\/p><\/pre>\n<p><\/code>typescript<br \/>\nimport { Component, ViewChild, ComponentRef } from '@angular\/core';<br \/>\nimport { MyService } from '.\/my.service';<\/p>\n<p>@Component({<br \/>\n  selector: 'app-parent',<br \/>\n  template: <code><app-child><\/app-child><\/code><br \/>\n})<br \/>\nexport class ParentComponent {<br \/>\n  @ViewChild(ChildComponent, { read: MyService }) myService!: MyService;<br \/>\n}<\/p>\n<p>@Component({<br \/>\n  selector: 'app-child',<br \/>\n  template: <code>Child Component<\/code><br \/>\n  providers: [MyService]<br \/>\n})<br \/>\nexport class ChildComponent {<br \/>\n  constructor(public myService: MyService) {}<br \/>\n}<\/p>\n<pre><code class=\"language-plaintext\"><p>Bu \u00f6rnekte, <code>ChildComponent<\/code> i\u00e7indeki <code>MyService<\/code>&#039;i,  <code>ParentComponent<\/code>&#039;ten eri\u015febiliyoruz.  <code>read: MyService<\/code> sayesinde <code>@ViewChild<\/code>,  <code>ChildComponent<\/code>&#039;in referans\u0131 yerine, <code>ChildComponent<\/code>&#039;te tan\u0131mlanan <code>MyService<\/code> \u00f6rne\u011fini d\u00f6nd\u00fcr\u00fcr. Bu durum \u00f6zellikle bile\u015fenler aras\u0131 ileti\u015fimde karma\u015fay\u0131 \u00f6nlemek ve kod okunabilirli\u011fini art\u0131rmak i\u00e7in olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n\n<h2>Angular&#039;da read Parametresi ile Farkl\u0131 Veri T\u00fcrlerini Okuma: Uygulama \u00d6rnekleri<\/h2>\n\n<p><code>read<\/code> parametresi,  <code>ElementRef<\/code>,  <code>ViewContainerRef<\/code>,  veya \u00f6zel bir sa\u011flay\u0131c\u0131 gibi bir\u00e7ok farkl\u0131 veri tipini okumam\u0131z\u0131 sa\u011flar.  A\u015fa\u011f\u0131da baz\u0131 \u00f6rnekler bulacaks\u0131n\u0131z:<\/p>\n\n<h3>ElementRef ile DOM Elemanlar\u0131na Eri\u015fmek<\/h3>\n\n<p><code>read: ElementRef<\/code>,  \u00f6\u011fenin DOM elementine eri\u015fim sa\u011flar.  Bu,  \u00f6zellikle DOM manip\u00fclasyonu gerektiren durumlarda yararl\u0131d\u0131r.  \u00d6rne\u011fin,  bir input eleman\u0131n\u0131n de\u011ferini de\u011fi\u015ftirmek veya stilini g\u00fcncellemek i\u00e7in <code>ElementRef<\/code> kullan\u0131labilir.<\/p>\n\n\n<h3>ViewContainerRef ile Dinamik \u0130\u00e7erik Eklemek<\/h3>\n\n<p><code>read: ViewContainerRef<\/code>,  \u00f6\u011fenin  <code>ViewContainerRef<\/code>&#039;ine eri\u015fim sa\u011flar.  Bu,  \u00f6\u011fenin i\u00e7ine dinamik olarak bile\u015fenler eklemek i\u00e7in kullan\u0131l\u0131r.  \u00d6rne\u011fin,  bir listede yeni \u00f6\u011feler eklemek veya bir modal pencere a\u00e7mak i\u00e7in <code>ViewContainerRef<\/code> kullan\u0131labilir.<\/p>\n\n\n<h3>\u00d6zel Sa\u011flay\u0131c\u0131lar\u0131 Okuma<\/h3>\n\n<p><code>read<\/code> parametresi,  \u00f6zel sa\u011flay\u0131c\u0131lar\u0131 okumak i\u00e7in de kullan\u0131labilir.  Bu,  bile\u015fenler aras\u0131nda ba\u011f\u0131ml\u0131l\u0131k enjeksiyonu yapman\u0131n alternatif bir yoludur.  Bu durum karma\u015f\u0131k uygulamalarda, bile\u015fenler aras\u0131nda veri payla\u015f\u0131m\u0131 ve ba\u011f\u0131ml\u0131l\u0131k y\u00f6netimini kolayla\u015ft\u0131r\u0131r. Daha detayl\u0131 bilgi i\u00e7in [https:\/\/fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret edebilirsiniz.<\/p>\n\n\n<h2>\u0130leri D\u00fczey Kullan\u0131mlar:  Performans ve G\u00fcvenlik<\/h2>\n\n<p><code>@ViewChild<\/code>&#039;\u0131 kullan\u0131rken, performans ve g\u00fcvenlik hususlar\u0131n\u0131 g\u00f6z \u00f6n\u00fcnde bulundurmak \u00f6nemlidir.  \u00d6rne\u011fin,  <code>@ViewChild<\/code>&#039;\u0131 s\u0131k s\u0131k kullanmak performans\u0131 olumsuz etkileyebilir.  Bu nedenle,  <code>@ViewChild<\/code>&#039;\u0131n yaln\u0131zca ger\u00e7ekten gerekli oldu\u011fu durumlarda kullan\u0131lmas\u0131 \u00f6nerilir.  Ayr\u0131ca,  <code>@ViewChild<\/code> ile elde edilen referans\u0131n her zaman mevcut oldu\u011fundan emin olmak gerekir.  E\u011fer referans hen\u00fcz olu\u015fturulmam\u0131\u015fsa,  <code>undefined<\/code> olabilir.  Bu durum,  <code>undefined<\/code>&#039;a ait bir \u00f6zellik veya metod \u00e7a\u011fr\u0131ld\u0131\u011f\u0131nda hatalara neden olabilir.  Bu nedenle,  referans\u0131n null olup olmad\u0131\u011f\u0131n\u0131 kontrol etmek her zaman g\u00fcvenlidir.<\/p>\n\n<div class=\"uyar\u0131\">\n  <h3>Dikkat!<\/h3>\n  <p><code>@ViewChild<\/code> ile elde edilen referanslara eri\u015fmeden \u00f6nce,  <code>AfterViewInit<\/code> ya\u015fam d\u00f6ng\u00fcs\u00fc kancas\u0131n\u0131n \u00e7al\u0131\u015fmas\u0131n\u0131 beklemeniz \u00f6nerilir.  Aksi takdirde,  referans hen\u00fcz olu\u015fturulmam\u0131\u015f olabilir ve hatalarla kar\u015f\u0131la\u015fabilirsiniz.<\/p>\n<\/div>\n\n\n<h2>\u00d6\u011frenme Yol Haritas\u0131<\/h2>\n\n<h3>Yeni Ba\u015flayanlar \u0130\u00e7in:<\/h3>\n\n<p>Temel <code>@ViewChild<\/code> kullan\u0131m\u0131n\u0131,  <code>ElementRef<\/code> ile DOM elemanlar\u0131na eri\u015fimi \u00f6\u011frenin. Basit \u00f6rnekler \u00fczerinde pratik yaparak kavramlar\u0131 peki\u015ftirin.<\/p>\n\n<h3>Orta Seviye:<\/h3>\n\n<p><code>read<\/code> parametresini kullanarak farkl\u0131 veri tiplerini okumay\u0131 ve  <code>ViewContainerRef<\/code> ile dinamik i\u00e7erik eklemeyi \u00f6\u011frenin.  Karma\u015f\u0131kl\u0131k derecesini kademeli olarak art\u0131rarak daha zorlu \u00f6rnekler \u00fczerinde \u00e7al\u0131\u015f\u0131n.<\/p>\n\n<h3>\u0130leri Seviye:<\/h3>\n\n<p>Performans optimizasyonu ve g\u00fcvenlik \u00f6nlemleri alarak b\u00fcy\u00fck uygulamalar i\u00e7in <code>@ViewChild<\/code> kullan\u0131m\u0131n\u0131 geli\u015ftirin.  <code>ContentChild<\/code> ile birlikte kullanmay\u0131 ve karma\u015f\u0131k senaryolarda hata y\u00f6netimini \u00f6\u011frenin.  Daha fazla bilgi i\u00e7in [https:\/\/fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret edebilirsiniz.<\/p>\n\n\n<h2>Sonu\u00e7 ve S\u0131k\u00e7a Sorulan Sorular<\/h2>\n\n<p>Bu makalede, Angular&#039;da <code>@ViewChild<\/code> dekorat\u00f6r\u00fcn\u00fcn <code>read<\/code> parametresi sayesinde sa\u011flad\u0131\u011f\u0131 esnekli\u011fi ve farkl\u0131 kullan\u0131m senaryolar\u0131n\u0131 inceledik.  <code>read<\/code> parametresi,  bile\u015fenler aras\u0131 ileti\u015fimi ve DOM manip\u00fclasyonunu kolayla\u015ft\u0131r\u0131rken,  performans ve g\u00fcvenlik konular\u0131na dikkat etmek \u00f6nemlidir.  Do\u011fru kullan\u0131ld\u0131\u011f\u0131nda, <code>@ViewChild<\/code> ve <code>read<\/code> parametresi,  Angular uygulamalar\u0131n\u0131z\u0131n yap\u0131s\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirebilir.<\/p>\n\n<h3>S\u0131k\u00e7a Sorulan Sorular:<\/h3>\n\n<ul>\n  <li><strong><code>@ViewChild<\/code> ve <code>@ViewChildren<\/code> aras\u0131ndaki fark nedir?<\/strong> <code>@ViewChild<\/code> tek bir \u00f6\u011feyi referans al\u0131rken, <code>@ViewChildren<\/code> birden fazla \u00f6\u011feyi referans al\u0131r. <\/li>\n  <li><strong><code>read<\/code> parametresi olmadan <code>@ViewChild<\/code> nas\u0131l kullan\u0131l\u0131r?<\/strong>  <code>read<\/code> parametresi belirtilmezse, <code>@ViewChild<\/code> varsay\u0131lan olarak \u00f6\u011fenin kendisini d\u00f6nd\u00fcr\u00fcr.<\/li>\n  <li><strong><code>@ViewChild<\/code>&#039;\u0131n performans\u0131n\u0131 nas\u0131l iyile\u015ftirebilirim?<\/strong>  Gereksiz kullan\u0131m\u0131 \u00f6nleyerek,  <code>AfterViewInit<\/code> ya\u015fam d\u00f6ng\u00fcs\u00fc kancas\u0131n\u0131 kullanarak ve referanslar\u0131n null olup olmad\u0131\u011f\u0131n\u0131 kontrol ederek performans\u0131 art\u0131rabilirsiniz.<\/li>\n  <li><strong><code>read<\/code> parametresi ile hangi veri tipleri okunabilir?<\/strong>  <code>ElementRef<\/code>, <code>ViewContainerRef<\/code>, \u00f6zel sa\u011flay\u0131c\u0131lar ve daha bir\u00e7ok veri tipi okunabilir.<\/li>\n  <li><strong><code>@ViewChild<\/code> ile hata y\u00f6netimi nas\u0131l yap\u0131l\u0131r?<\/strong>  <code>undefined<\/code> kontrol\u00fc ve uygun hata yakalama mekanizmalar\u0131 kullan\u0131lmal\u0131d\u0131r.<\/li>\n<\/ul>\n\n<p>Yazar: Fatih Soysal<\/p><\/pre>\n<p><\/code><\/p>\n","protected":false},"excerpt":{"rendered":"Angular&#039;da viewChild&#039;\u0131n \u00c7ok Y\u00fczl\u00fc Yap\u0131s\u0131: read Parametresi Angular&#039;da bile\u015fenler aras\u0131 ileti\u015fimi sa\u011flayan g\u00fc\u00e7l\u00fc bir ara\u00e7 olan @ViewChild dekorat\u00f6r\u00fc,&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-28413","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>Angular&#039;da viewChild&#039;\u0131n \u00c7ok Y\u00fczl\u00fc Yap\u0131s\u0131: read Parametresi<\/title>\n<meta name=\"description\" content=\"Angular&#039;da bile\u015fenler aras\u0131 ileti\u015fimi sa\u011flayan g\u00fc\u00e7l\u00fc bir ara\u00e7 olan @ViewChild dekorat\u00f6r\u00fc, read parametresiyle birlikte beklenmedik esneklik sunar. Bu makalede, read parametresi sayesinde @ViewChild&#039;\u0131n farkl\u0131 kullan\u0131m senaryolar\u0131n\u0131, basitten ileri seviyelere do\u011fru ad\u0131m ad\u0131m ele alaca\u011f\u0131z. Angular&#039;da bile\u015fenlerinizin derinliklerine inerek, performans\u0131n\u0131z\u0131 art\u0131racak ve kodunuzun okunabilirli\u011fini iyile\u015ftirecek y\u00f6ntemleri ke\u015ffedeceksiniz. Haz\u0131rsan\u0131z, Angular&#039;\u0131n bu gizli g\u00fcc\u00fcn\u00fc birlikte ortaya \u00e7\u0131karal\u0131m!\" \/>\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\/angularda-viewchildin-cok-yuzlu-yapisi-read-parametresi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Angular&#039;da viewChild&#039;\u0131n \u00c7ok Y\u00fczl\u00fc Yap\u0131s\u0131: read Parametresi\" \/>\n<meta property=\"og:description\" content=\"Angular&#039;da bile\u015fenler aras\u0131 ileti\u015fimi sa\u011flayan g\u00fc\u00e7l\u00fc bir ara\u00e7 olan @ViewChild dekorat\u00f6r\u00fc, read parametresiyle birlikte beklenmedik esneklik sunar. Bu makalede, read parametresi sayesinde @ViewChild&#039;\u0131n farkl\u0131 kullan\u0131m senaryolar\u0131n\u0131, basitten ileri seviyelere do\u011fru ad\u0131m ad\u0131m ele alaca\u011f\u0131z. Angular&#039;da bile\u015fenlerinizin derinliklerine inerek, performans\u0131n\u0131z\u0131 art\u0131racak ve kodunuzun okunabilirli\u011fini iyile\u015ftirecek y\u00f6ntemleri ke\u015ffedeceksiniz. 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