{"id":32857,"date":"2025-10-26T18:32:17","date_gmt":"2025-10-26T15:32:17","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/angular-signals-nedir-ve-uygulamada-nasil-kullanilir-turkce-rehber\/"},"modified":"2025-10-26T18:32:17","modified_gmt":"2025-10-26T15:32:17","slug":"angular-signals-nedir-ve-uygulamada-nasil-kullanilir-turkce-rehber","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/angular-signals-nedir-ve-uygulamada-nasil-kullanilir-turkce-rehber\/","title":{"rendered":"Angular Signals Nedir ve Uygulamada Nas\u0131l Kullan\u0131l\u0131r? (T\u00fcrk\u00e7e Rehber)"},"content":{"rendered":"<p><body><\/p>\n<p>Angular uygulamalar\u0131n\u0131zda performans ve reaktiviteyi k\u00f6kten de\u011fi\u015ftiren Signals yap\u0131s\u0131n\u0131 merak m\u0131 ediyorsunuz? Bu kapsaml\u0131 rehberde, Angular Signals&#8217;\u0131n ne oldu\u011funu, nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 ve ger\u00e7ek d\u00fcnya \u00f6rnekleriyle projelerinizde nas\u0131l kullanabilece\u011finizi ad\u0131m ad\u0131m ke\u015ffedin. Art\u0131k daha temiz, daha h\u0131zl\u0131 ve daha y\u00f6netilebilir kod yazmaya haz\u0131r olun!<\/p>\n<p>Modern web uygulamalar\u0131 s\u00fcrekli etkile\u015fim halindedir. Kullan\u0131c\u0131lar veriyi girer, butonlara t\u0131klar, listeleri kayd\u0131r\u0131r ve uygulaman\u0131n an\u0131nda tepki vermesini bekler. \u0130\u015fte tam da bu noktada reaktivite devreye girer. Reaktivite, bir veri de\u011fi\u015fti\u011finde, bu veriye ba\u011fl\u0131 olan t\u00fcm bile\u015fenlerin otomatik ve verimli bir \u015fekilde g\u00fcncellenmesi yetene\u011fidir. Angular gibi tek sayfa uygulamas\u0131 (SPA) \u00e7er\u00e7eveleri i\u00e7in bu, kullan\u0131c\u0131 deneyimini do\u011frudan etkileyen kritik bir \u00f6zelliktir.<\/p>\n<p>Peki, Angular bu reaktiviteyi daha \u00f6nce nas\u0131l sa\u011fl\u0131yordu? Temel olarak, Angular&#8217;\u0131n de\u011fi\u015fim alg\u0131lama mekanizmas\u0131 (change detection) devreye giriyordu. Bu mekanizma, bile\u015fen a\u011fac\u0131ndaki de\u011fi\u015fiklikleri tespit etmek ve DOM&#8217;u buna g\u00f6re g\u00fcncellemek i\u00e7in tasarlanm\u0131\u015ft\u0131r. Geleneksel olarak, Angular bunu Zone.js ad\u0131 verilen bir k\u00fct\u00fcphane arac\u0131l\u0131\u011f\u0131yla yapm\u0131\u015ft\u0131r. Zone.js, asenkron i\u015flemler (HTTP istekleri, zamanlay\u0131c\u0131lar, kullan\u0131c\u0131 etkile\u015fimleri) tetiklendi\u011finde Angular&#8217;\u0131 bilgilendirerek t\u00fcm uygulama genelinde bir de\u011fi\u015fim alg\u0131lama d\u00f6ng\u00fcs\u00fc ba\u015flat\u0131r. Bu yakla\u015f\u0131m, bir\u00e7ok durumda olduk\u00e7a iyi \u00e7al\u0131\u015fsa da, b\u00fcy\u00fck ve karma\u015f\u0131k uygulamalarda performans darbo\u011fazlar\u0131na yol a\u00e7abilir.<\/p>\n<p>\u00d6rne\u011fin, bir uygulaman\u0131n y\u00fczlerce bile\u015feni oldu\u011funu ve her bir kullan\u0131c\u0131n\u0131n her etkile\u015fiminde t\u00fcm bile\u015fen a\u011fac\u0131n\u0131n kontrol edildi\u011fini d\u00fc\u015f\u00fcn\u00fcn. Her ne kadar Angular <code>OnPush<\/code> de\u011fi\u015fim alg\u0131lama stratejisi gibi optimizasyonlar sunsa da, Zone.js&#8217;in do\u011fas\u0131 gere\u011fi geni\u015f kapsaml\u0131 kontroller, gereksiz yeniden render&#8217;lara ve dolay\u0131s\u0131yla yava\u015flamalara neden olabilir. Geli\u015ftiriciler bu sorunlar\u0131 \u00e7\u00f6zmek i\u00e7in RxJS gibi g\u00fc\u00e7l\u00fc reaktif programlama k\u00fct\u00fcphanelerini kullanmak zorunda kalm\u0131\u015ft\u0131r. RxJS, karma\u015f\u0131k asenkron veri ak\u0131\u015flar\u0131n\u0131 y\u00f6netmek i\u00e7in harika bir ara\u00e7 olsa da, kendi \u00f6\u011frenme e\u011frisi ve zengin operat\u00f6r seti ile gelir. Bu durum, \u00f6zellikle yeni ba\u015flayanlar i\u00e7in bazen kafa kar\u0131\u015ft\u0131r\u0131c\u0131 olabilir ve kodun okunabilirli\u011fini d\u00fc\u015f\u00fcrebilir.<\/p>\n<p>\u0130\u015fte tam da bu ihtiya\u00e7lar do\u011frultusunda Angular Signals, daha modern, daha verimli ve daha sezgisel bir reaktivite modeli sunarak sahneye \u00e7\u0131kt\u0131. Signals, Zone.js&#8217;in t\u00fcm uygulamay\u0131 kontrol etme yakla\u015f\u0131m\u0131n\u0131n aksine, sadece belirli bir sinyale abone olan bile\u015fenlerin veya DOM par\u00e7alar\u0131n\u0131n g\u00fcncellenmesini sa\u011flar. Bu, \u00e7ok daha ince taneli bir de\u011fi\u015fim alg\u0131lama demektir. Veri de\u011fi\u015fti\u011finde sadece etkilenen k\u0131s\u0131mlar g\u00fcncellendi\u011fi i\u00e7in, uygulama performans\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde artar ve geli\u015ftiriciler i\u00e7in kod yazma deneyimi basitle\u015fir. K\u0131sacas\u0131, Angular Signals, uygulamalar\u0131m\u0131z\u0131n daha h\u0131zl\u0131, daha ak\u0131c\u0131 ve daha duyarl\u0131 olmas\u0131n\u0131 sa\u011flayarak hem kullan\u0131c\u0131lar\u0131 hem de geli\u015ftiricileri mutlu etmeyi hedefler.<\/p>\n<h2>Angular Signals Temel Kavramlar\u0131 Nelerdir ve Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/h2>\n<p>Angular Signals, reaktif programlamaya yeni bir bak\u0131\u015f a\u00e7\u0131s\u0131 getiriyor. Temelde, bir &#8220;signal&#8221; (sinyal), de\u011feri de\u011fi\u015fti\u011finde otomatik olarak ba\u011f\u0131ml\u0131 oldu\u011fu t\u00fcm yerleri bilgilendiren bir de\u011fer tutucudur. Bu, bir yay\u0131lma (propagation) mekanizmas\u0131 arac\u0131l\u0131\u011f\u0131yla ger\u00e7ekle\u015fir. RxJS&#8217;in aksine, Signals do\u011frudan de\u011ferleri i\u00e7erir ve bunlara eri\u015fmek i\u00e7in <code>.value<\/code> veya <code>subscribe()<\/code> gibi y\u00f6ntemlere ihtiya\u00e7 duymazs\u0131n\u0131z; do\u011frudan bir fonksiyon \u00e7a\u011fr\u0131s\u0131 gibi eri\u015firsiniz (\u00f6rn. <code>mySignal()<\/code>). Bu, \u00f6zellikle \u015fablonlar\u0131n\u0131zda (templates) kodun daha basit ve okunabilir olmas\u0131n\u0131 sa\u011flar.<\/p>\n<p>Angular Signals&#8217;\u0131n kalbinde \u00fc\u00e7 ana kavram bulunur: <code>signal()<\/code>, <code>computed()<\/code> ve <code>effect()<\/code>. Bu \u00fc\u00e7 yap\u0131 ta\u015f\u0131, reaktif uygulaman\u0131z\u0131 in\u015fa etmenizi sa\u011flar.<\/p>\n<ul>\n<li>\n      <strong><code>signal()<\/code>: Temel Reaktif De\u011ferler<\/strong><br \/>\n      <code>signal()<\/code> fonksiyonu, reaktif bir de\u011fer yaratman\u0131n en temel yoludur. \u0130\u00e7ine ba\u015flang\u0131\u00e7 de\u011feri alarak bir <code>WritableSignal<\/code> nesnesi d\u00f6nd\u00fcr\u00fcr. Bu nesne, mevcut de\u011ferine eri\u015fmek i\u00e7in bir getter fonksiyonu ve de\u011ferini de\u011fi\u015ftirmek i\u00e7in <code>set()<\/code> ve <code>update()<\/code> metotlar\u0131 sa\u011flar. Bir sinyalin de\u011feri de\u011fi\u015fti\u011finde, bu sinyali okuyan (ba\u011f\u0131ml\u0131 olan) t\u00fcm <code>computed<\/code> veya <code>effect<\/code> bloklar\u0131 otomatik olarak yeniden \u00e7al\u0131\u015f\u0131r.<\/p>\n<pre><code>\n        import { signal } from '@angular\/core';\n\n        const count = signal(0); \/\/ Ba\u015flang\u0131\u00e7 de\u011feri 0 olan bir sinyal\n        console.log(count());   \/\/ 0 - De\u011fere eri\u015fim\n\n        count.set(5);           \/\/ De\u011feri do\u011frudan 5 olarak ayarlar\n        console.log(count());   \/\/ 5\n\n        count.update(value => value + 1); \/\/ Mevcut de\u011feri kullanarak g\u00fcnceller\n        console.log(count());   \/\/ 6\n      <\/pre>\n<p><\/code><br \/>\n      <code>set()<\/code> metodu, sinyalin de\u011ferini do\u011frudan yeni bir de\u011fere ayarlar. <code>update()<\/code> metodu ise, mevcut de\u011feri al\u0131p yeni bir de\u011fer d\u00f6nd\u00fcren bir geri arama fonksiyonu (callback function) kabul eder. Bu, mevcut de\u011fere ba\u011fl\u0131 olarak g\u00fcncelleme yapman\u0131z gerekti\u011finde olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r, \u00f6zellikle nesneler veya dizilerle \u00e7al\u0131\u015f\u0131rken immutability (de\u011fi\u015fmezlik) prensibini koruman\u0131za yard\u0131mc\u0131 olur.\n    <\/li>\n<li>\n      <strong><code>computed()<\/code>: T\u00fcretilmi\u015f (Derived) Sinyaller<\/strong><br \/>\n      <code>computed()<\/code> fonksiyonu, bir veya daha fazla sinyalden t\u00fcretilmi\u015f yeni bir sinyal olu\u015fturman\u0131z\u0131 sa\u011flar. Bu, bir sinyalin de\u011ferinin ba\u015fka sinyallerin de\u011ferlerine g\u00f6re hesapland\u0131\u011f\u0131 durumlarda kullan\u0131l\u0131r. <code>computed<\/code> sinyaller, ba\u011f\u0131ml\u0131 olduklar\u0131 sinyallerden herhangi biri de\u011fi\u015fti\u011finde otomatik olarak yeniden hesaplan\u0131r. En \u00f6nemlisi, <code>computed<\/code> sinyaller \"memoize\" edilir; yani, ba\u011f\u0131ml\u0131 olduklar\u0131 sinyaller de\u011fi\u015fmedi\u011fi s\u00fcrece, tekrar tekrar \u00e7a\u011fr\u0131lsa bile hesaplama fonksiyonu yeniden \u00e7al\u0131\u015ft\u0131r\u0131lmaz. Bu, ciddi performans iyile\u015ftirmeleri sa\u011flar.<\/p>\n<pre><code>\n        import { signal, computed } from '@angular\/core';\n\n        const firstName = signal('Can');\n        const lastName = signal('Y\u0131lmaz');\n\n        const fullName = computed(() => <code>${firstName()} ${lastName()}<\/code>);\n        console.log(fullName()); \/\/ \"Can Y\u0131lmaz\"\n\n        firstName.set('Ay\u015fe');\n        console.log(fullName()); \/\/ \"Ay\u015fe Y\u0131lmaz\" (otomatik olarak g\u00fcncellendi)\n      <\/pre>\n<p><\/code><br \/>\n      Bu \u00f6rnekte, <code>fullName<\/code> sinyali, <code>firstName<\/code> veya <code>lastName<\/code> sinyallerinden herhangi biri de\u011fi\u015fti\u011finde otomatik olarak g\u00fcncellenir. <code>computed<\/code>'in i\u00e7indeki fonksiyon, sadece ba\u011f\u0131ml\u0131 sinyallerin de\u011ferleri de\u011fi\u015fti\u011finde tetiklenir, bu da verimli bir reaktivite sa\u011flar.\n    <\/li>\n<li>\n      <strong><code>effect()<\/code>: Yan Etkileri Y\u00f6netme<\/strong><br \/>\n      <code>effect()<\/code> fonksiyonu, sinyal de\u011ferlerine tepki olarak \"yan etkileri\" \u00e7al\u0131\u015ft\u0131rman\u0131za olanak tan\u0131r. Yan etkiler, bir sinyalin de\u011feri de\u011fi\u015fti\u011finde tetiklenen kod par\u00e7alar\u0131d\u0131r ve genellikle DOM manip\u00fclasyonu, konsola \u00e7\u0131kt\u0131 yazma, veritaban\u0131 kaydetme veya API \u00e7a\u011fr\u0131lar\u0131 gibi \u015feyleri i\u00e7erir. <code>effect()<\/code> fonksiyonu, ba\u011f\u0131ml\u0131 oldu\u011fu sinyallerden herhangi biri de\u011fi\u015fti\u011finde otomatik olarak yeniden \u00e7al\u0131\u015f\u0131r.<\/p>\n<pre><code>\n        import { signal, effect } from '@angular\/core';\n\n        const userId = signal(1);\n\n        effect(() => {\n          console.log(<code>Kullan\u0131c\u0131 ID de\u011fi\u015fti: ${userId()}<\/code>);\n          \/\/ userId() de\u011ferini kullanarak bir API \u00e7a\u011fr\u0131s\u0131 yapabilir veya localStorage'a kaydedebilirsiniz.\n        });\n\n        userId.set(2); \/\/ Konsola \"Kullan\u0131c\u0131 ID de\u011fi\u015fti: 2\" yazd\u0131r\u0131r\n      <\/pre>\n<p><\/code><\/p>\n<p>Bir <code>effect<\/code> blo\u011fu, ba\u011f\u0131ml\u0131 oldu\u011fu sinyallerin ilk okundu\u011fu anda otomatik olarak \u00e7al\u0131\u015f\u0131r ve daha sonra bu sinyaller her de\u011fi\u015fti\u011finde tekrar \u00e7al\u0131\u015f\u0131r. <code>effect<\/code>'in i\u00e7indeki kod, Angular'\u0131n de\u011fi\u015fim alg\u0131lama d\u00f6ng\u00fcs\u00fcnden ba\u011f\u0131ms\u0131z olarak tetiklenebilir ve bu da performans\u0131 optimize etmede b\u00fcy\u00fck bir rol oynar. Ancak, <code>effect<\/code>'leri dikkatli kullanmak \u00f6nemlidir; sonsuz d\u00f6ng\u00fcleri \u00f6nlemek veya gereksiz yan etkileri tetiklememek i\u00e7in sadece ger\u00e7ekten ihtiya\u00e7 duyulan yerlerde kullan\u0131lmal\u0131d\u0131rlar.<\/p>\n<\/li>\n<\/ul>\n<aside class=\"expert-tip\">\n<h3>Uzman \u0130pucu: Immutability (De\u011fi\u015fmezlik) Prensibi<\/h3>\n<p>Signals ile \u00e7al\u0131\u015f\u0131rken, \u00f6zellikle nesneler ve diziler gibi referans tiplerle u\u011fra\u015f\u0131rken immutability prensibini benimsemek \u00e7ok \u00f6nemlidir. \u00d6rne\u011fin, bir diziyi do\u011frudan de\u011fi\u015ftirmek yerine (<code>push()<\/code>, <code>splice()<\/code>), <code>update()<\/code> metodunu kullanarak dizinin yeni bir kopyas\u0131n\u0131 d\u00f6nd\u00fcrmeniz, Signals'\u0131n de\u011fi\u015fiklikleri do\u011fru bir \u015fekilde alg\u0131lamas\u0131n\u0131 sa\u011flar. Bu, daha \u00f6ng\u00f6r\u00fclebilir bir reaktivite ve daha az hata demektir.<\/p>\n<\/aside>\n<p>Signals, Angular'\u0131n Zone.js'e olan ba\u011f\u0131ml\u0131l\u0131\u011f\u0131n\u0131 azaltma ve gelecekte tamamen ortadan kald\u0131rma potansiyeline sahiptir. Bu da daha k\u00fc\u00e7\u00fck uygulama boyutlar\u0131, daha h\u0131zl\u0131 ba\u015flang\u0131\u00e7 s\u00fcreleri ve genel olarak daha iyi bir performans anlam\u0131na gelir. Geli\u015ftirici deneyimi a\u00e7\u0131s\u0131ndan ise, kodun daha az \"sihirli\" hissettirmesi, reaktif ak\u0131\u015f\u0131n daha kolay takip edilebilir olmas\u0131 ve karma\u015f\u0131k RxJS operat\u00f6rlerine olan ihtiyac\u0131n azalmas\u0131 gibi avantajlar sunar.<\/p>\n<h2>Angular Signals ile Basit Bir Saya\u00e7 Uygulamas\u0131 Nas\u0131l Yap\u0131l\u0131r?<\/h2>\n<p>Angular Signals'\u0131n nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlaman\u0131n en iyi yollar\u0131ndan biri, basit bir \u00f6rnek \u00fczerinde ad\u0131m ad\u0131m ilerlemektir. \u015eimdi, bir saya\u00e7 uygulamas\u0131 \u00fczerinden <code>signal()<\/code> ve <code>computed()<\/code> kavramlar\u0131n\u0131 uygulamal\u0131 olarak g\u00f6relim. Bu \u00f6rnek,Signals'\u0131n temel kullan\u0131m\u0131n\u0131 ve nas\u0131l reaktif de\u011ferler olu\u015fturup g\u00fcncelleyebilece\u011fimizi anlamam\u0131z\u0131 sa\u011flayacak.<\/p>\n<h3>Ad\u0131m 1: Temel <code>signal()<\/code> Kullan\u0131m\u0131<\/h3>\n<p>\u0130lk olarak, sayac\u0131m\u0131z\u0131n mevcut de\u011ferini tutacak bir <code>signal<\/code> olu\u015fturaca\u011f\u0131z. Ard\u0131ndan, bu de\u011feri \u015fablonumuzda g\u00f6sterecek ve bir buton arac\u0131l\u0131\u011f\u0131yla de\u011ferini art\u0131r\u0131p azaltabilecek bir bile\u015fen tasarlayaca\u011f\u0131z.<\/p>\n<pre><code class=\"language-typescript\">\n    \/\/ counter.component.ts\n    import { Component, signal } from '@angular\/core';\n    import { CommonModule } from '@angular\/common'; \/\/ *ngIf, *ngFor gibi direktifler i\u00e7in\n\n    @Component({\n      selector: 'app-counter',\n      template: <code><h3>Basit Saya\u00e7 Uygulamas\u0131<\/h3>\n        <p>Mevcut De\u011fer: <strong>{{ count() }}<\/strong><\/p>\n        <div>\n          <button (click)=\"increment()\">Art\u0131r (+1)<\/button>\n          <button (click)=\"decrement()\">Azalt (-1)<\/button>\n          <button (click)=\"reset()\">S\u0131f\u0131rla<\/button>\n        <\/div>\n\n        <p *ngIf=\"count() % 2 === 0\">De\u011fer \u00e7ift say\u0131.<\/p>\n        <p *ngIf=\"count() % 2 !== 0\">De\u011fer tek say\u0131.<\/p><\/code>,\n      styles: [<code>div { margin-top: 10px; }\n        button { margin-right: 8px; padding: 10px 15px; border: none; border-radius: 5px; cursor: pointer; }\n        button:first-of-type { background-color: #4CAF50; color: white; }\n        button:nth-of-type(2) { background-color: #f44336; color: white; }\n        button:last-of-type { background-color: #008CBA; color: white; }\n        p { margin-top: 10px; font-style: italic; }<\/code>],\n      standalone: true, \/\/ Angular 15+ ile standalone bile\u015fenler kullanabiliriz\n      imports: [CommonModule]\n    })\n    export class CounterComponent {\n      \/\/ Ba\u015flang\u0131\u00e7 de\u011feri 0 olan bir sinyal olu\u015fturuyoruz.\n      \/\/ TypeScript'te <code>signal(0)<\/code> otomatik olarak <code>WritableSignal<number><\/code> tipini \u00e7\u0131kar\u0131r.\n      count = signal(0);\n\n      \/\/ Sayac\u0131 bir art\u0131rmak i\u00e7in kullan\u0131lan metot\n      increment() {\n        \/\/ <code>update<\/code> metodunu kullanarak mevcut de\u011feri al\u0131p 1 ekleyerek g\u00fcncelliyoruz.\n        this.count.update(currentValue => currentValue + 1);\n        console.log('Saya\u00e7 art\u0131r\u0131ld\u0131, yeni de\u011fer:', this.count());\n      }\n\n      \/\/ Sayac\u0131 bir azaltmak i\u00e7in kullan\u0131lan metot\n      decrement() {\n        \/\/ <code>update<\/code> metodunu kullanarak mevcut de\u011feri al\u0131p 1 \u00e7\u0131kararak g\u00fcncelliyoruz.\n        this.count.update(currentValue => currentValue - 1);\n        console.log('Saya\u00e7 azalt\u0131ld\u0131, yeni de\u011fer:', this.count());\n      }\n\n      \/\/ Sayac\u0131 ba\u015flang\u0131\u00e7 de\u011ferine (0) s\u0131f\u0131rlamak i\u00e7in kullan\u0131lan metot\n      reset() {\n        \/\/ <code>set<\/code> metodunu kullanarak sinyalin de\u011ferini do\u011frudan 0'a ayarl\u0131yoruz.\n        this.count.set(0);\n        console.log('Saya\u00e7 s\u0131f\u0131rland\u0131, yeni de\u011fer:', this.count());\n      }\n    }\n  <\/pre>\n<p><\/code><\/p>\n<p>Yukar\u0131daki \u00f6rnekte, <code>count<\/code> bir sinyal oldu\u011fu i\u00e7in \u015fablonda <code>count()<\/code> \u015feklinde \u00e7a\u011fr\u0131larak de\u011ferine eri\u015filir. Bir butona t\u0131kland\u0131\u011f\u0131nda <code>increment()<\/code>, <code>decrement()<\/code> veya <code>reset()<\/code> metotlar\u0131 \u00e7a\u011fr\u0131l\u0131r ve bu metotlar <code>count<\/code> sinyalinin de\u011ferini g\u00fcnceller. Angular, <code>count<\/code> sinyalindeki bu de\u011fi\u015fiklikleri otomatik olarak alg\u0131lar ve sadece <code>count()<\/code> de\u011ferini kullanan <code>p<\/code> etiketindeki metni ve ko\u015fullu <code>*ngIf<\/code> bloklar\u0131n\u0131 yeniden render eder. Bu, Zone.js'in t\u00fcm bile\u015fen a\u011fac\u0131n\u0131 kontrol etmesinden \u00e7ok daha verimlidir.<\/p>\n<h3>Ad\u0131m 2: <code>computed()<\/code> ile T\u00fcretilmi\u015f De\u011ferler Ekleme<\/h3>\n<p>\u015eimdi, sayac\u0131m\u0131z\u0131n de\u011ferinden t\u00fcretilmi\u015f ba\u015fka bir reaktif de\u011fer ekleyelim. \u00d6rne\u011fin, sayac\u0131n \u00e7ift mi tek mi oldu\u011funu g\u00f6steren veya sayac\u0131n iki kat\u0131n\u0131 hesaplayan bir de\u011fer. Bunu <code>computed()<\/code> ile yapaca\u011f\u0131z.<\/p>\n<pre><code class=\"language-typescript\">\n    \/\/ computed-counter.component.ts\n    import { Component, signal, computed } from '@angular\/core';\n    import { CommonModule } from '@angular\/common';\n\n    @Component({\n      selector: 'app-computed-counter',\n      template: <code><h3>Computed Sinyalleri ile Saya\u00e7<\/h3>\n        <p>Mevcut De\u011fer: <strong>{{ count() }}<\/strong><\/p>\n        <p>\u0130ki Kat\u0131: <strong>{{ doubleCount() }}<\/strong><\/p>\n        <p>Tek mi \u00c7ift mi?: <strong>{{ parityStatus() }}<\/strong><\/p>\n\n        <div>\n          <button (click)=\"increment()\">Art\u0131r (+1)<\/button>\n          <button (click)=\"decrement()\">Azalt (-1)<\/button>\n          <button (click)=\"reset()\">S\u0131f\u0131rla<\/button>\n        <\/div><\/code>,\n      styles: [<code>div { margin-top: 10px; }\n        button { margin-right: 8px; padding: 10px 15px; border: none; border-radius: 5px; cursor: pointer; }\n        button:first-of-type { background-color: #4CAF50; color: white; }\n        button:nth-of-type(2) { background-color: #f44336; color: white; }\n        button:last-of-type { background-color: #008CBA; color: white; }<\/code>],\n      standalone: true,\n      imports: [CommonModule]\n    })\n    export class ComputedCounterComponent {\n      count = signal(0); \/\/ Temel sayac sinyali\n\n      \/\/ <code>doubleCount<\/code> bir <code>computed<\/code> sinyalidir.\n      \/\/ <code>count<\/code> sinyali her de\u011fi\u015fti\u011finde bu de\u011fer yeniden hesaplan\u0131r.\n      \/\/ Ancak <code>count<\/code> de\u011fi\u015fmedi\u011fi s\u00fcrece, <code>doubleCount()<\/code> tekrar \u00e7a\u011fr\u0131lsa bile hesaplama tekrarlanmaz (memoization).\n      doubleCount = computed(() => {\n        console.log('doubleCount hesaplan\u0131yor...'); \/\/ Sadece count de\u011fi\u015fti\u011finde \u00e7al\u0131\u015f\u0131r\n        return this.count() * 2;\n      });\n\n      \/\/ <code>parityStatus<\/code> da bir <code>computed<\/code> sinyalidir.\n      \/\/ Say\u0131n\u0131n tek mi \u00e7ift mi oldu\u011funu belirler.\n      parityStatus = computed(() => {\n        console.log('parityStatus hesaplan\u0131yor...'); \/\/ Sadece count de\u011fi\u015fti\u011finde \u00e7al\u0131\u015f\u0131r\n        return this.count() % 2 === 0 ? '\u00c7ift' : 'Tek';\n      });\n\n      increment() {\n        this.count.update(currentValue => currentValue + 1);\n      }\n\n      decrement() {\n        this.count.update(currentValue => currentValue - 1);\n      }\n\n      reset() {\n        this.count.set(0);\n      }\n    }\n  <\/pre>\n<p><\/code><\/p>\n<p>Bu \u00f6rnekte, <code>doubleCount<\/code> ve <code>parityStatus<\/code> ad\u0131nda iki yeni <code>computed<\/code> sinyal tan\u0131mlad\u0131k. Bu sinyaller, <code>count<\/code> sinyalinin de\u011ferine ba\u011f\u0131ml\u0131d\u0131r. <code>count<\/code> sinyali <code>increment()<\/code>, <code>decrement()<\/code> veya <code>reset()<\/code> metotlar\u0131 ile her de\u011fi\u015fti\u011finde, <code>doubleCount<\/code> ve <code>parityStatus<\/code> sinyalleri otomatik olarak yeniden hesaplanacak ve \u015fablondaki ilgili yerler g\u00fcncellenecektir. Konsol \u00e7\u0131kt\u0131lar\u0131na dikkat ederseniz, <code>computed<\/code> bloklar\u0131n\u0131n sadece ba\u011f\u0131ml\u0131 sinyal (<code>count<\/code>) de\u011fi\u015fti\u011finde \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 g\u00f6receksiniz. Bu, Angular Signals'\u0131n sundu\u011fu en \u00f6nemli performans avantajlar\u0131ndan biridir: gereksiz hesaplamalar\u0131 \u00f6nlemek.<\/p>\n<p>Bu basit saya\u00e7 \u00f6rne\u011fi, Angular Signals'\u0131n temelini ve reaktif programlamay\u0131 ne kadar kolayla\u015ft\u0131rd\u0131\u011f\u0131n\u0131 net bir \u015fekilde g\u00f6steriyor. Bir sonraki b\u00f6l\u00fcmde, bu kavramlar\u0131 daha karma\u015f\u0131k bir \"Yap\u0131lacaklar Listesi\" uygulamas\u0131 \u00fczerinde nas\u0131l kullanabilece\u011fimizi ke\u015ffedece\u011fiz.<\/p>\n<h2>Ger\u00e7ek D\u00fcnya Senaryosu: Bir ToDo Uygulamas\u0131nda Signals Nas\u0131l Kullan\u0131l\u0131r?<\/h2>\n<p>\u015eimdiye kadar Signals'\u0131n temelini ve basit bir saya\u00e7 \u00fczerinde nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 g\u00f6rd\u00fck. \u015eimdi bu bilgiyi daha ger\u00e7ek\u00e7i ve yayg\u0131n bir senaryo olan bir \"Yap\u0131lacaklar Listesi\" (Todo App) uygulamas\u0131nda kullanal\u0131m. Bu, kullan\u0131c\u0131 giri\u015fini, liste y\u00f6netimini ve durum filtrelemeyi Signals ile nas\u0131l ele alabilece\u011fimizi g\u00f6sterecek.<\/p>\n<h3>Kullan\u0131c\u0131 Giri\u015fini ve Filtrelemeyi <code>signal()<\/code> ile Y\u00f6netmek<\/h3>\n<p>Bir Todo uygulamas\u0131 genellikle bir liste \u00f6\u011fesi ekleme, \u00f6\u011feleri tamamlama\/i\u015faretleme ve listeyi filtreleme gibi i\u015flevlere sahiptir. T\u00fcm bu uygulama durumlar\u0131n\u0131 (state) Signals kullanarak y\u00f6netece\u011fiz. \u0130\u015fte ad\u0131m ad\u0131m bir TodoListComponent \u00f6rne\u011fi:<\/p>\n<pre><code class=\"language-typescript\">\n    \/\/ todo-list.component.ts\n    import { Component, signal, computed } from '@angular\/core';\n    import { CommonModule } from '@angular\/common';\n    import { FormsModule } from '@angular\/forms'; \/\/ [(ngModel)] kullanmak i\u00e7in\n\n    \/\/ Todo \u00f6\u011fesinin tipini tan\u0131ml\u0131yoruz\n    interface Todo {\n      id: number;\n      text: string;\n      completed: boolean;\n    }\n\n    @Component({\n      selector: 'app-todo-list',\n      template: <code><h3>Yap\u0131lacaklar Listesi (Angular Signals ile)<\/h3>\n\n        <div class=\"input-section\">\n          <input\n            type=\"text\"\n            [(ngModel)]=\"newTodoText\"\n            (keyup.enter)=\"addTodo()\"\n            placeholder=\"Yeni g\u00f6rev ekle...\"\n          >\n          <button (click)=\"addTodo()\">Ekle<\/button>\n        <\/div>\n\n        <div class=\"filter-section\">\n          <input\n            type=\"text\"\n            [(ngModel)]=\"filterText\"\n            placeholder=\"G\u00f6rev ara...\"\n          >\n          <button (click)=\"clearFilter()\" *ngIf=\"filterText()\">Filtreyi Temizle<\/button>\n        <\/div>\n\n        <ul>\n          <li *ngFor=\"let todo of filteredTodos()\">\n            <input\n              type=\"checkbox\"\n              [checked]=\"todo.completed\"\n              (change)=\"toggleCompletion(todo.id)\"\n            >\n            <span [class.completed]=\"todo.completed\">{{ todo.text }}<\/span>\n            <button class=\"delete-button\" (click)=\"deleteTodo(todo.id)\">Sil<\/button>\n          <\/li>\n          <li *ngIf=\"filteredTodos().length === 0\" class=\"no-todos\">\n            Hen\u00fcz g\u00f6rev yok veya filtrenize uygun sonu\u00e7 bulunamad\u0131.\n          <\/li>\n        <\/ul><\/code>,\n      styles: [<code>:host { display: block; max-width: 600px; margin: 20px auto; padding: 20px; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }\n        h3 { color: #333; text-align: center; margin-bottom: 20px; }\n        .input-section, .filter-section { display: flex; gap: 10px; margin-bottom: 15px; }\n        input[type=\"text\"] { flex-grow: 1; padding: 10px; border: 1px solid #ccc; border-radius: 4px; }\n        button { padding: 10px 15px; background-color: #007bff; color: white; border: none; border-radius: 4px; cursor: pointer; transition: background-color 0.2s; }\n        button:hover { background-color: #0056b3; }\n        ul { list-style: none; padding: 0; }\n        li { display: flex; align-items: center; padding: 10px 0; border-bottom: 1px solid #eee; }\n        li:last-child { border-bottom: none; }\n        input[type=\"checkbox\"] { margin-right: 10px; transform: scale(1.2); }\n        span { flex-grow: 1; font-size: 1.1em; }\n        .completed { text-decoration: line-through; color: #888; }\n        .delete-button { background-color: #dc3545; margin-left: auto; padding: 5px 10px; }\n        .delete-button:hover { background-color: #c82333; }\n        .no-todos { text-align: center; color: #666; font-style: italic; padding: 20px; }<\/code>],\n      standalone: true,\n      imports: [CommonModule, FormsModule]\n    })\n    export class TodoListComponent {\n      \/\/ Uygulaman\u0131n durumunu (state) tutan sinyaller\n      todos = signal<Todo[]>([]); \/\/ T\u00fcm yap\u0131lacaklar listesi\n      newTodoText = signal('');   \/\/ Yeni eklenecek g\u00f6revin metni\n      filterText = signal('');    \/\/ Filtreleme i\u00e7in kullan\u0131lacak metin\n\n      \/\/ <code>filteredTodos<\/code> bir computed sinyalidir.\n      \/\/ <code>todos<\/code> veya <code>filterText<\/code> sinyallerinden herhangi biri de\u011fi\u015fti\u011finde yeniden hesaplan\u0131r.\n      filteredTodos = computed(() => {\n        const currentFilter = this.filterText().toLowerCase();\n        return this.todos().filter(todo =>\n          todo.text.toLowerCase().includes(currentFilter)\n        );\n      });\n\n      \/\/ Yeni bir g\u00f6rev ekleme metodu\n      addTodo() {\n        const text = this.newTodoText().trim();\n        if (text) {\n          this.todos.update(currentTodos => [\n            ...currentTodos,\n            { id: Date.now(), text: text, completed: false }\n          ]);\n          this.newTodoText.set(''); \/\/ Input'u temizle\n        }\n      }\n\n      \/\/ G\u00f6revin tamamlanma durumunu de\u011fi\u015ftirme metodu\n      toggleCompletion(id: number) {\n        this.todos.update(currentTodos =>\n          currentTodos.map(todo =>\n            todo.id === id ? { ...todo, completed: !todo.completed } : todo\n          )\n        );\n      }\n\n      \/\/ G\u00f6revi silme metodu\n      deleteTodo(id: number) {\n        this.todos.update(currentTodos =>\n          currentTodos.filter(todo => todo.id !== id)\n        );\n      }\n\n      \/\/ Filtre metnini temizleme metodu\n      clearFilter() {\n        this.filterText.set('');\n      }\n    }\n  <\/pre>\n<p><\/code><\/p>\n<aside class=\"expert-tip\">\n<h3>Uzman \u0130pucu: Immutability ve <code>update()<\/code> Metodu<\/h3>\n<p><code>todos<\/code> sinyalini g\u00fcncellerken, do\u011frudan <code>push()<\/code> veya <code>splice()<\/code> gibi diziyi de\u011fi\u015ftiren metotlar\u0131 kullanmak yerine <code>this.todos.update(...)<\/code> metodu i\u00e7inde dizinin yeni bir kopyas\u0131n\u0131 olu\u015fturdu\u011fumuza dikkat edin (\u00f6rn. <code>[...currentTodos, newTodo]<\/code> veya <code>currentTodos.filter(...)<\/code>). Bu, immutability prensibine uymak i\u00e7in hayati \u00f6nem ta\u015f\u0131r ve Signals'\u0131n de\u011fi\u015fiklikleri do\u011fru bir \u015fekilde alg\u0131lamas\u0131n\u0131 sa\u011flar.<\/p>\n<\/aside>\n<p>Bu \u00f6rnekte, <code>todos<\/code>, <code>newTodoText<\/code> ve <code>filterText<\/code> gibi uygulama durumlar\u0131n\u0131 y\u00f6netmek i\u00e7in <code>signal()<\/code> kullan\u0131yoruz. <code>filteredTodos<\/code> ise, <code>todos<\/code> ve <code>filterText<\/code> sinyallerine ba\u011f\u0131ml\u0131 bir <code>computed()<\/code> sinyalidir. <code>filterText<\/code> her de\u011fi\u015fti\u011finde veya yeni bir todo eklendi\u011finde\/silindi\u011finde (<code>todos<\/code> de\u011fi\u015fti\u011finde), <code>filteredTodos<\/code> otomatik olarak yeniden hesaplan\u0131r ve UI g\u00fcncellenir. Bu yakla\u015f\u0131m, Angular'\u0131n de\u011fi\u015fim alg\u0131lama mekanizmas\u0131 i\u00e7in i\u015f y\u00fck\u00fcn\u00fc b\u00fcy\u00fck \u00f6l\u00e7\u00fcde azalt\u0131r, \u00e7\u00fcnk\u00fc sadece ilgili sinyallerin de\u011fi\u015fti\u011fi yerler yeniden render edilir. Kullan\u0131c\u0131 deneyimi daha ak\u0131c\u0131 hale gelir ve kod daha kolay anla\u015f\u0131l\u0131r.<\/p>\n<h3><code>effect()<\/code> ile Yan Etkileri Y\u00f6netme: LocalStorage'a Kaydetme<\/h3>\n<p>Bir Todo uygulamas\u0131nda s\u0131k\u00e7a kar\u015f\u0131la\u015f\u0131lan bir ihtiya\u00e7 da, g\u00f6rev listesini taray\u0131c\u0131n\u0131n yerel depolama alan\u0131na (<code>localStorage<\/code>) kaydetmek ve uygulamay\u0131 her a\u00e7t\u0131\u011f\u0131n\u0131zda geri y\u00fcklemektir. Bu, bir yan etki \u00f6rne\u011fidir ve <code>effect()<\/code> kullanarak bunu kolayca yapabiliriz.<\/p>\n<pre><code class=\"language-typescript\">\n    \/\/ todo-list-with-effect.component.ts\n    import { Component, signal, computed, effect } from '@angular\/core';\n    import { CommonModule } from '@angular\/common';\n    import { FormsModule } from '@angular\/forms';\n\n    interface Todo {\n      id: number;\n      text: string;\n      completed: boolean;\n    }\n\n    @Component({\n      selector: 'app-todo-list-with-effect',\n      template: <code><h3>Yap\u0131lacaklar Listesi (Effect ile LocalStorage)<\/h3>\n        <!-- Yukar\u0131daki TodoListComponent ile ayn\u0131 \u015fablonu kullan\u0131yoruz -->\n        <div class=\"input-section\">\n          <input\n            type=\"text\"\n            [(ngModel)]=\"newTodoText\"\n            (keyup.enter)=\"addTodo()\"\n            placeholder=\"Yeni g\u00f6rev ekle...\"\n          >\n          <button (click)=\"addTodo()\">Ekle<\/button>\n        <\/div>\n\n        <div class=\"filter-section\">\n          <input\n            type=\"text\"\n            [(ngModel)]=\"filterText\"\n            placeholder=\"G\u00f6rev ara...\"\n          >\n          <button (click)=\"clearFilter()\" *ngIf=\"filterText()\">Filtreyi Temizle<\/button>\n        <\/div>\n\n        <ul>\n          <li *ngFor=\"let todo of filteredTodos()\">\n            <input\n              type=\"checkbox\"\n              [checked]=\"todo.completed\"\n              (change)=\"toggleCompletion(todo.id)\"\n            >\n            <span [class.completed]=\"todo.completed\">{{ todo.text }}<\/span>\n            <button class=\"delete-button\" (click)=\"deleteTodo(todo.id)\">Sil<\/button>\n          <\/li>\n          <li *ngIf=\"filteredTodos().length === 0\" class=\"no-todos\">\n            Hen\u00fcz g\u00f6rev yok veya filtrenize uygun sonu\u00e7 bulunamad\u0131.\n          <\/li>\n        <\/ul><\/code>,\n      styles: [<code>:host { display: block; max-width: 600px; margin: 20px auto; padding: 20px; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }\n        h3 { color: #333; text-align: center; margin-bottom: 20px; }\n        .input-section, .filter-section { display: flex; gap: 10px; margin-bottom: 15px; }\n        input[type=\"text\"] { flex-grow: 1; padding: 10px; border: 1px solid #ccc; border-radius: 4px; }\n        button { padding: 10px 15px; background-color: #007bff; color: white; border: none; border-radius: 4px; cursor: pointer; transition: background-color 0.2s; }\n        button:hover { background-color: #0056b3; }\n        ul { list-style: none; padding: 0; }\n        li { display: flex; align-items: center; padding: 10px 0; border-bottom: 1px solid #eee; }\n        li:last-child { border-bottom: none; }\n        input[type=\"checkbox\"] { margin-right: 10px; transform: scale(1.2); }\n        span { flex-grow: 1; font-size: 1.1em; }\n        .completed { text-decoration: line-through; color: #888; }\n        .delete-button { background-color: #dc3545; margin-left: auto; padding: 5px 10px; }\n        .delete-button:hover { background-color: #c82333; }\n        .no-todos { text-align: center; color: #666; font-style: italic; padding: 20px; }<\/code>],\n      standalone: true,\n      imports: [CommonModule, FormsModule]\n    })\n    export class TodoListWithEffectComponent {\n      todos = signal<Todo[]>([]);\n      newTodoText = signal('');\n      filterText = signal('');\n\n      filteredTodos = computed(() => {\n        const currentFilter = this.filterText().toLowerCase();\n        return this.todos().filter(todo =>\n          todo.text.toLowerCase().includes(currentFilter)\n        );\n      });\n\n      constructor() {\n        \/\/ Uygulama y\u00fcklendi\u011finde localStorage'dan g\u00f6revleri geri y\u00fckle\n        const storedTodos = localStorage.getItem('angular-signals-todos');\n        if (storedTodos) {\n          this.todos.set(JSON.parse(storedTodos));\n        }\n\n        \/\/ <code>effect<\/code> kullanarak <code>todos<\/code> sinyali her de\u011fi\u015fti\u011finde localStorage'a kaydet\n        effect(() => {\n          console.log('Todos listesi de\u011fi\u015fti, localStorage g\u00fcncelleniyor.');\n          localStorage.setItem('angular-signals-todos', JSON.stringify(this.todos()));\n        }, { allowSignalWrites: true }); \/\/ effect i\u00e7inde sinyal yazma izni (nadiren kullan\u0131l\u0131r, dikkat!)\n      }\n\n      addTodo() {\n        const text = this.newTodoText().trim();\n        if (text) {\n          this.todos.update(currentTodos => [\n            ...currentTodos,\n            { id: Date.now(), text: text, completed: false }\n          ]);\n          this.newTodoText.set('');\n        }\n      }\n\n      toggleCompletion(id: number) {\n        this.todos.update(currentTodos =>\n          currentTodos.map(todo =>\n            todo.id === id ? { ...todo, completed: !todo.completed } : todo\n          )\n        );\n      }\n\n      deleteTodo(id: number) {\n        this.todos.update(currentTodos =>\n          currentTodos.filter(todo => todo.id !== id)\n        );\n      }\n\n      clearFilter() {\n        this.filterText.set('');\n      }\n    }\n  <\/pre>\n<p><\/code><\/p>\n<p>Bu g\u00fcncellenmi\u015f \u00f6rnekte, <code>constructor<\/code> i\u00e7inde bir <code>effect<\/code> tan\u0131mlad\u0131k. Bu <code>effect<\/code>, <code>todos<\/code> sinyalinin de\u011ferine ba\u011f\u0131ml\u0131d\u0131r. <code>todos<\/code> sinyali her de\u011fi\u015fti\u011finde (yeni g\u00f6rev eklendi\u011finde, tamamlanma durumu de\u011fi\u015ftirildi\u011finde veya bir g\u00f6rev silindi\u011finde), <code>effect<\/code> blo\u011fu otomatik olarak tetiklenir ve g\u00fcncel todo listesini <code>localStorage<\/code>'a kaydeder. Uygulama ilk y\u00fcklendi\u011finde de, <code>constructor<\/code> i\u00e7inde <code>localStorage<\/code>'dan verileri okuyarak <code>todos<\/code> sinyalini ba\u015flat\u0131yoruz.<\/p>\n<aside class=\"expert-tip\">\n<h3>Uzman \u0130pucu: <code>effect<\/code> ve Temizlik<\/h3>\n<p><code>effect()<\/code> fonksiyonu, ba\u011f\u0131ml\u0131l\u0131klar\u0131n\u0131 izlemeye devam eder ve bile\u015fen yok edildi\u011finde otomatik olarak temizlenir. Ancak, daha karma\u015f\u0131k senaryolarda veya bir <code>effect<\/code> i\u00e7inde ba\u015fka bir <code>effect<\/code> olu\u015fturdu\u011funuzda manuel temizlik gerekebilir. Unutmay\u0131n, <code>effect<\/code>'ler genellikle d\u0131\u015f sistemlerle etkile\u015fim kurmak (API \u00e7a\u011fr\u0131lar\u0131, DOM manip\u00fclasyonu, localStorage i\u015flemleri) i\u00e7in tasarlanm\u0131\u015ft\u0131r, do\u011frudan UI'da de\u011fer g\u00f6stermek i\u00e7in de\u011fil. UI i\u00e7in <code>computed()<\/code> veya do\u011frudan \u015fablon eri\u015fimi tercih edilmelidir.<\/p>\n<\/aside>\n<p>Bu iki ger\u00e7ek d\u00fcnya senaryosu, Signals'\u0131n reaktif durumu y\u00f6netme, t\u00fcretilmi\u015f de\u011ferler olu\u015fturma ve yan etkileri ele alma konusunda ne kadar g\u00fc\u00e7l\u00fc ve esnek oldu\u011funu g\u00f6stermektedir. Geli\u015ftiriciler, bu yap\u0131 ta\u015flar\u0131n\u0131 kullanarak daha az hata riski ta\u015f\u0131yan, daha performansl\u0131 ve daha okunabilir kodlar yazabilirler.<\/p>\n<h2>Angular Signals ile \u0130leri Seviye Kullan\u0131m Senaryolar\u0131 ve \u0130pu\u00e7lar\u0131<\/h2>\n<p>Angular Signals, sadece basit reaktivite sa\u011flamakla kalmaz, ayn\u0131 zamanda daha karma\u015f\u0131k senaryolarda da geli\u015ftiricilere g\u00fc\u00e7l\u00fc ara\u00e7lar sunar. Deneyimli Angular geli\u015ftiricileri i\u00e7in Signals'\u0131n RxJS ile entegrasyonu, performans optimizasyonu ve mobil uyumluluk ba\u011flam\u0131ndaki rol\u00fc, konunun derinli\u011fini g\u00f6sterir.<\/p>\n<h3>RxJS ve Signals Aras\u0131ndaki K\u00f6pr\u00fcler: <code>toSignal()<\/code> ve <code>toObservable()<\/code><\/h3>\n<p>Angular ekosistemi uzun s\u00fcredir RxJS ile yo\u011fun bir \u015fekilde i\u00e7 i\u00e7e ge\u00e7mi\u015ftir. Mevcut projelerde RxJS kodunu Signals'a d\u00f6n\u00fc\u015ft\u00fcrmek veya tam tersi, kritik bir ihtiya\u00e7t\u0131r. Angular, bu ge\u00e7i\u015fi kolayla\u015ft\u0131rmak i\u00e7in iki yard\u0131mc\u0131 fonksiyon sunar:<\/p>\n<ul>\n<li>\n      <strong><code>toSignal(observable)<\/code>:<\/strong> Bir RxJS Observable'\u0131 bir Signal'a d\u00f6n\u00fc\u015ft\u00fcr\u00fcr. Observable yeni bir de\u011fer yayd\u0131\u011f\u0131nda, Signal'\u0131n de\u011feri g\u00fcncellenir. Bu, mevcut RxJS tabanl\u0131 veri ak\u0131\u015flar\u0131n\u0131z\u0131 Signals ekosistemine sorunsuz bir \u015fekilde entegre etmenizi sa\u011flar.<\/p>\n<pre><code class=\"language-typescript\">\n        import { Component, signal } from '@angular\/core';\n        import { toSignal } from '@angular\/core\/rxjs-interop'; \/\/ Yeni import\n        import { interval, map } from 'rxjs';\n\n        @Component({\n          selector: 'app-rxjs-to-signal',\n          template: <code><h4>RxJS&#039;ten Signal&#039;a D\u00f6n\u00fc\u015f\u00fcm<\/h4>\n            <p>Saya\u00e7 (RxJS ile ba\u015flat\u0131ld\u0131): {{ rxjsCounter() }}<\/p><\/code>,\n          standalone: true\n        })\n        export class RxjsToSignalComponent {\n          \/\/ Her 1 saniyede bir artan bir RxJS Observable'\u0131\n          private counter$ = interval(1000).pipe(map(val => val + 1));\n\n          \/\/ Observable'\u0131 bir Signal'a d\u00f6n\u00fc\u015ft\u00fcr\u00fcyoruz\n          rxjsCounter = toSignal(this.counter$, { initialValue: 0 });\n\n          constructor() {\n            \/\/ Signal de\u011feri de\u011fi\u015fti\u011finde konsola yazd\u0131rabiliriz\n            \/\/ effect(() => {\n            \/\/   console.log('RxJS sayac\u0131 sinyal de\u011feri:', this.rxjsCounter());\n            \/\/ });\n          }\n        }\n      <\/pre>\n<p><\/code><br \/>\n      Bu sayede, mevcut bir servisinizden gelen Observable tabanl\u0131 veriyi, bile\u015fenlerinizde daha basit bir \u015fekilde Signal olarak t\u00fcketebilirsiniz.\n    <\/li>\n<li>\n      <strong><code>toObservable(signal)<\/code>:<\/strong> Bir Signal'\u0131 bir RxJS Observable'a d\u00f6n\u00fc\u015ft\u00fcr\u00fcr. Signal'\u0131n de\u011feri de\u011fi\u015fti\u011finde, Observable yeni bir de\u011fer yayar. Bu, Signals'tan gelen verileri karma\u015f\u0131k RxJS operat\u00f6rleri (\u00f6rne\u011fin, <code>debounceTime<\/code>, <code>switchMap<\/code>) ile i\u015flemek istedi\u011finizde kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n<pre><code class=\"language-typescript\">\n        import { Component, signal } from '@angular\/core';\n        import { toObservable } from '@angular\/core\/rxjs-interop'; \/\/ Yeni import\n        import { debounceTime, distinctUntilChanged } from 'rxjs';\n\n        @Component({\n          selector: 'app-signal-to-rxjs',\n          template: <code><h4>Signal&#039;dan RxJS&#039;e D\u00f6n\u00fc\u015f\u00fcm<\/h4>\n            <input type=\"text\" [ngModel]=\"searchTerm()\" (ngModelChange)=\"searchTerm.set($event)\" placeholder=\"Ara...\">\n            <p>Son Aranan Terim (debounce ile): {{ debouncedSearchTerm }}<\/p><\/code>,\n          standalone: true\n        })\n        export class SignalToRxjsComponent {\n          searchTerm = signal('');\n          debouncedSearchTerm = '';\n\n          constructor() {\n            toObservable(this.searchTerm).pipe(\n              debounceTime(500), \/\/ 500ms gecikme\n              distinctUntilChanged() \/\/ Sadece de\u011fer de\u011fi\u015ftiyse devam et\n            ).subscribe(term => {\n              this.debouncedSearchTerm = term;\n              console.log('Debounce edilmi\u015f arama terimi:', term);\n              \/\/ Burada arama API'\u0131 \u00e7a\u011fr\u0131s\u0131 yap\u0131labilir\n            });\n          }\n        }\n      <\/pre>\n<p><\/code><br \/>\n      Bu ikili, Angular projelerinde hem RxJS'in g\u00fcc\u00fcnden yararlanmaya devam ederken hem de Signals'\u0131n getirdi\u011fi basitlik ve performans avantajlar\u0131n\u0131 kullanman\u0131n \u00f6n\u00fcn\u00fc a\u00e7ar. Hangi yakla\u015f\u0131m\u0131n ne zaman kullan\u0131laca\u011f\u0131, spesifik kullan\u0131m senaryosuna ve tak\u0131m\u0131n tercihine ba\u011fl\u0131d\u0131r. Genellikle, basit de\u011ferler ve t\u00fcretilmi\u015f durumlar i\u00e7in Signals, karma\u015f\u0131k asenkron veri ak\u0131\u015flar\u0131 ve operat\u00f6r zincirlemeleri i\u00e7in ise RxJS tercih edilir.\n    <\/li>\n<\/ul>\n<h3>Performans Optimizasyonunda Signals'\u0131n Rol\u00fc<\/h3>\n<p>Signals'\u0131n en b\u00fcy\u00fck faydalar\u0131ndan biri, uygulaman\u0131n genel performans\u0131na yapt\u0131\u011f\u0131 katk\u0131d\u0131r. Nas\u0131l m\u0131?<\/p>\n<ul>\n<li>\n      <strong>Daha \u0130nce Taneli De\u011fi\u015fim Alg\u0131lama:<\/strong> Signals, Zone.js'in t\u00fcm bile\u015fen a\u011fac\u0131n\u0131 kontrol etmesinin aksine, yaln\u0131zca de\u011fi\u015fen sinyale ba\u011f\u0131ml\u0131 olan spesifik DOM par\u00e7alar\u0131n\u0131 veya bile\u015fenleri g\u00fcnceller. Bu, \u00e7ok daha az i\u015f y\u00fck\u00fc ve dolay\u0131s\u0131yla daha h\u0131zl\u0131 g\u00fcncellemeler anlam\u0131na gelir. \u00d6zellikle derin bile\u015fen a\u011fa\u00e7lar\u0131na sahip b\u00fcy\u00fck uygulamalarda bu fark hissedilir olur.\n    <\/li>\n<li>\n      <strong>Zone.js'siz Uygulamalar:<\/strong> Angular, gelecekte tamamen Zone.js'siz uygulamalar\u0131n yaz\u0131lmas\u0131na olanak tan\u0131mak i\u00e7in \u00e7al\u0131\u015f\u0131yor. Signals, bu vizyonun temelini olu\u015fturur. Zone.js olmadan, uygulaman\u0131n boyutu k\u00fc\u00e7\u00fcl\u00fcr, ba\u015flang\u0131\u00e7 s\u00fcresi h\u0131zlan\u0131r ve daha da \u00f6nemlisi, de\u011fi\u015fim alg\u0131lama \u00fczerinde tam kontrol sa\u011flan\u0131r. Bu, \u00f6zellikle performansa duyarl\u0131 mobil web uygulamalar\u0131 i\u00e7in kritik bir avantajd\u0131r.\n    <\/li>\n<li>\n      <strong><code>OnPush<\/code> Stratejisi ile Sinerji:<\/strong> Signals, <code>OnPush<\/code> de\u011fi\u015fim alg\u0131lama stratejisiyle m\u00fckemmel bir uyum i\u00e7indedir. <code>OnPush<\/code> kullanan bile\u015fenler, yaln\u0131zca input'lar\u0131 de\u011fi\u015fti\u011finde (veya bir Observable'dan gelen veri yayd\u0131\u011f\u0131nda) yeniden kontrol edilir. Signals ile, bir bile\u015fenin i\u00e7indeki bir sinyalin de\u011fi\u015fmesi, o bile\u015fenin <code>OnPush<\/code> stratejisine ra\u011fmen do\u011fru bir \u015fekilde g\u00fcncellenmesini sa\u011flar. Bu, geli\u015ftiricilerin <code>OnPush<\/code>'un avantajlar\u0131ndan daha kolay yararlanmas\u0131na olanak tan\u0131r.\n    <\/li>\n<li>\n      <strong><code>defer<\/code> Bloklar\u0131:<\/strong> Angular 17 ile gelen <code>@defer<\/code> bloklar\u0131, \u015fablonun belirli k\u0131s\u0131mlar\u0131n\u0131 ko\u015fullu veya asenkron olarak y\u00fcklemenizi sa\u011flar. Bu, sayfa y\u00fckleme s\u00fcresini k\u0131saltarak performans\u0131n\u0131z\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir. Signals, <code>@defer<\/code> bloklar\u0131n\u0131n ne zaman tetiklenece\u011fini belirlemek i\u00e7in de kullan\u0131labilir, \u00f6rne\u011fin bir sinyal true oldu\u011funda bir bile\u015feni y\u00fcklemek gibi. Bu, \u00f6zellikle mobil cihazlarda bant geni\u015fli\u011fi ve i\u015flem g\u00fcc\u00fc k\u0131s\u0131tl\u0131 oldu\u011funda b\u00fcy\u00fck fayda sa\u011flar.<\/p>\n<pre><code class=\"language-html\">\n        <!-- Sadece userProfileLoaded sinyali true oldu\u011funda UserProfileComponent'i y\u00fckle -->\n        <!-- Bu kod do\u011frudan body i\u00e7inde yer almayacak, ancak fikir vermek i\u00e7in bir \u00f6rnek -->\n        ?defer (when userProfileLoaded()) {\n          <app-user-profile \/>\n        }\n      <\/pre>\n<p><\/code>\n    <\/li>\n<\/ul>\n<p>Mobil uyumlu HTML \u00fcretme konusunda, Signals do\u011frudan CSS veya HTML yap\u0131s\u0131n\u0131 etkilemese de, uygulaman\u0131n genel performans\u0131n\u0131 art\u0131rarak mobil deneyimi dolayl\u0131 yoldan iyile\u015ftirir. Daha h\u0131zl\u0131 y\u00fcklenen, daha ak\u0131c\u0131 ve daha az kaynak t\u00fcketen bir uygulama, k\u00fc\u00e7\u00fck ekranlarda ve s\u0131n\u0131rl\u0131 internet ba\u011flant\u0131lar\u0131nda bile daha iyi performans g\u00f6sterir. Ayr\u0131ca, Signals tabanl\u0131 reaktivite, karma\u015f\u0131k ve dinamik kullan\u0131c\u0131 aray\u00fczlerini (UI) mobil cihazlarda bile sorunsuz bir \u015fekilde olu\u015fturman\u0131za olanak tan\u0131r. Responsive tasar\u0131m ilkeleri elbette HTML ve CSS ile sa\u011flan\u0131r, ancak Signals'\u0131n performansa katk\u0131s\u0131, bu tasar\u0131mlar\u0131n mobil platformlarda da sorunsuz \u00e7al\u0131\u015fmas\u0131n\u0131 destekler.<\/p>\n<p>\u00d6rne\u011fin, mobil cihazlarda farkl\u0131 d\u00fczenler ve bile\u015fen boyutlar\u0131 i\u00e7in genellikle CSS <code>media query<\/code>'leri kullan\u0131l\u0131r. Signals, bu d\u00fczenler aras\u0131ndaki ge\u00e7i\u015flerin neden oldu\u011fu yeniden render i\u015flemlerini minimize ederek mobil cihazlardaki gecikmeyi azalt\u0131r. A\u015fa\u011f\u0131da, mobil uyumlu bir tasar\u0131m i\u00e7in tipik bir <code>media query<\/code> \u00f6rne\u011fi verilmi\u015ftir (bu bir CSS \u00f6rne\u011fi olsa da, mant\u0131\u011f\u0131n\u0131 anlamak i\u00e7in faydal\u0131d\u0131r):<\/p>\n<pre><code class=\"language-css\">\n    \/* Temel stil: K\u00fc\u00e7\u00fck ekranlar (mobil) i\u00e7in *\/\n    .container {\n      flex-direction: column;\n      padding: 10px;\n    }\n    .card {\n      width: 100%;\n      margin-bottom: 15px;\n    }\n\n    \/* Orta boy ekranlar (tablet) i\u00e7in kurallar *\/\n    @media (min-width: 768px) {\n      .container {\n        flex-direction: row;\n        flex-wrap: wrap;\n        justify-content: space-around;\n        padding: 20px;\n      }\n      .card {\n        width: 48%; \/* \u0130ki s\u00fctun *\/\n        margin-bottom: 20px;\n      }\n    }\n\n    \/* B\u00fcy\u00fck ekranlar (masa\u00fcst\u00fc) i\u00e7in kurallar *\/\n    @media (min-width: 1200px) {\n      .card {\n        width: 30%; \/* \u00dc\u00e7 s\u00fctun *\/\n      }\n    }\n  <\/pre>\n<p><\/code><\/p>\n<p>Bu t\u00fcr <code>media query<\/code>'ler ile de\u011fi\u015fen bir UI'da, Signals, her layout de\u011fi\u015fikli\u011finde gereksiz t\u00fcm bile\u015fenlerin yeniden kontrol edilmesini engelleyerek sadece de\u011fi\u015fen veya ba\u011fl\u0131 olan k\u0131s\u0131mlar\u0131 g\u00fcncel tutar, b\u00f6ylece \u00f6zellikle mobil cihazlarda ak\u0131c\u0131l\u0131k ve enerji verimlili\u011fi sa\u011flar.<\/p>\n<aside class=\"expert-tip\">\n<h3>Uzman \u0130pucu: RxJS ve Signals Ne Zaman Kullan\u0131l\u0131r?<\/h3>\n<p>Genel bir kural olarak, uygulaman\u0131zdaki tekil ve basit reaktif durumlar (\u00f6rn. bir saya\u00e7, bir toggle, bir form alan\u0131 de\u011feri) i\u00e7in Signals kullan\u0131n. Ancak, karma\u015f\u0131k asenkron veri ak\u0131\u015flar\u0131n\u0131 y\u00f6netmeniz, birden fazla kaynaktan gelen veriyi birle\u015ftirmeniz veya zaman tabanl\u0131 operat\u00f6rler (<code>debounce<\/code>, <code>throttle<\/code>) gibi g\u00fc\u00e7l\u00fc RxJS yeteneklerine ihtiyac\u0131n\u0131z oldu\u011funda RxJS Observables tercih edin. \u0130deal senaryo, bu ikisini en iyi yanlar\u0131n\u0131 kullanarak birlikte \u00e7al\u0131\u015ft\u0131rmakt\u0131r.<\/p>\n<\/aside>\n<h2>Angular Signals Kullanman\u0131n Avantajlar\u0131 ve Potansiyel Zorluklar\u0131 Nelerdir?<\/h2>\n<p>Her yeni teknoloji gibi, Angular Signals da geli\u015ftiricilere \u00f6nemli avantajlar sunarken, beraberinde baz\u0131 potansiyel zorluklar\u0131 da getirmektedir. Bu b\u00f6l\u00fcm, Signals'\u0131n genel resmini daha iyi anlaman\u0131za yard\u0131mc\u0131 olacak.<\/p>\n<h3>Avantajlar:<\/h3>\n<ul>\n<li>\n      <strong>Basitlik ve Okunabilirlik:<\/strong> Signals, reaktif durumu y\u00f6netmeyi \u00e7ok daha basit hale getirir. RxJS'in karma\u015f\u0131k operat\u00f6r zincirlemelerine k\u0131yasla, Signals'\u0131n <code>signal()<\/code>, <code>computed()<\/code> ve <code>effect()<\/code> yap\u0131lar\u0131 daha sezgiseldir ve \u00f6\u011frenme e\u011frisi daha d\u00fc\u015f\u00fckt\u00fcr. \u015eablonlarda de\u011ferlere do\u011frudan fonksiyon \u00e7a\u011fr\u0131s\u0131 gibi eri\u015fmek, kodu daha okunabilir k\u0131lar.\n    <\/li>\n<li>\n      <strong>Daha \u0130yi Performans:<\/strong> En \u00f6nemli avantajlar\u0131ndan biridir. Signals, \u00e7ok daha ince taneli bir reaktivite modeli sunar. Yaln\u0131zca de\u011fi\u015fen sinyale ba\u011f\u0131ml\u0131 olan bile\u015fenler veya DOM par\u00e7alar\u0131 g\u00fcncellenir. Bu, gereksiz yeniden render i\u015flemlerini ortadan kald\u0131r\u0131r ve \u00f6zellikle b\u00fcy\u00fck, karma\u015f\u0131k uygulamalarda performans\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131r.\n    <\/li>\n<li>\n      <strong>\u00d6ng\u00f6r\u00fclebilir Reaktivite:<\/strong> Signals, veri ak\u0131\u015f\u0131n\u0131 daha \u00f6ng\u00f6r\u00fclebilir hale getirir. Bir sinyalin de\u011feri de\u011fi\u015fti\u011finde, hangi <code>computed<\/code> veya <code>effect<\/code> bloklar\u0131n\u0131n tetiklenece\u011fi a\u00e7\u0131kt\u0131r. Bu, hata ay\u0131klamay\u0131 kolayla\u015ft\u0131r\u0131r ve beklenmedik davran\u0131\u015flar\u0131 azalt\u0131r.\n    <\/li>\n<li>\n      <strong>Geli\u015ftirici Deneyimi:<\/strong> Daha az kazan do\u011furucu kod (boilerplate code), daha az <code>ngOnChanges<\/code> veya <code>AsyncPipe<\/code> kullan\u0131m\u0131, geli\u015ftiricilerin daha h\u0131zl\u0131 ve daha keyifli bir \u015fekilde kod yazmas\u0131n\u0131 sa\u011flar. Reaktif durum y\u00f6netimini basitle\u015ftirmek, genel geli\u015ftirici verimlili\u011fini art\u0131r\u0131r.\n    <\/li>\n<li>\n      <strong>Zone.js'e Ba\u011f\u0131ml\u0131l\u0131\u011f\u0131n Azalmas\u0131:<\/strong> Signals, Angular'\u0131n Zone.js'e olan ba\u011f\u0131ml\u0131l\u0131\u011f\u0131n\u0131 azaltma yolunda at\u0131lm\u0131\u015f b\u00fcy\u00fck bir ad\u0131md\u0131r. Gelecekte Zone.js'siz uygulamalar, daha k\u00fc\u00e7\u00fck paket boyutlar\u0131 ve daha h\u0131zl\u0131 ba\u015flang\u0131\u00e7 s\u00fcreleri vaat ediyor.\n    <\/li>\n<\/ul>\n<h3>Potansiyel Zorluklar:<\/h3>\n<ul>\n<li>\n      <strong>\u00d6\u011frenme E\u011frisi:<\/strong> RxJS'e al\u0131\u015fk\u0131n olan geli\u015ftiriciler i\u00e7in Signals'\u0131n farkl\u0131 bir reaktif model sunmas\u0131, ba\u015flang\u0131\u00e7ta bir \u00f6\u011frenme e\u011frisi yaratabilir. <code>signal()<\/code> de\u011ferlerine eri\u015fmek i\u00e7in <code>()<\/code> kullanmak gibi sentaktik farkl\u0131l\u0131klar al\u0131\u015fkanl\u0131k gerektirebilir.\n    <\/li>\n<li>\n      <strong>Mevcut Projelerde Ge\u00e7i\u015f Stratejileri:<\/strong> B\u00fcy\u00fck ve hali haz\u0131rda var olan Angular projelerinde Signals'a tam ge\u00e7i\u015f yapmak, belirli bir planlama ve kademeli bir s\u00fcre\u00e7 gerektirebilir. Neyse ki <code>toSignal()<\/code> ve <code>toObservable()<\/code> gibi yard\u0131mc\u0131 fonksiyonlar bu ge\u00e7i\u015fi kolayla\u015ft\u0131r\u0131r.\n    <\/li>\n<li>\n      <strong><code>effect<\/code> Kullan\u0131m\u0131 S\u0131ras\u0131nda Dikkat Edilmesi Gerekenler:<\/strong> <code>effect<\/code>'ler g\u00fc\u00e7l\u00fcd\u00fcr ancak dikkatli kullan\u0131lmal\u0131d\u0131r. Yanl\u0131\u015f kullan\u0131ld\u0131\u011f\u0131nda sonsuz d\u00f6ng\u00fclere yol a\u00e7abilir veya gereksiz yan etkiler tetikleyebilirler. <code>effect<\/code>'lerin sadece yan etkileri y\u00f6netmek i\u00e7in kullan\u0131lmas\u0131 ve i\u00e7inde sinyal de\u011ferini tekrar de\u011fi\u015ftirmekten ka\u00e7\u0131n\u0131lmas\u0131 \u00f6nemlidir (aksi halde <code>allowSignalWrites: true<\/code> se\u00e7ene\u011fi ile a\u00e7\u0131k\u00e7a belirtilmelidir, ki bu nadir bir durum olmal\u0131d\u0131r).\n    <\/li>\n<li>\n      <strong>RxJS ile Birlikte Kullan\u0131m Karma\u015fas\u0131:<\/strong> Hem RxJS hem de Signals'\u0131 ayn\u0131 projede kullanmak, \u00f6zellikle yeni ba\u015flayanlar i\u00e7in ne zaman hangisinin kullan\u0131laca\u011f\u0131na dair bir kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131 yaratabilir. Net s\u0131n\u0131rlar ve en iyi uygulamalar belirlemek \u00f6nemlidir.\n    <\/li>\n<\/ul>\n<p>\u00d6zetle, Angular Signals, modern Angular geli\u015ftirme i\u00e7in g\u00fc\u00e7l\u00fc ve umut vadeden bir ektir. Do\u011fru kullan\u0131ld\u0131\u011f\u0131nda, uygulamalar\u0131n\u0131z\u0131n performans\u0131n\u0131 ve kod kalitesini \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirme potansiyeline sahiptir. Ancak her ara\u00e7 gibi, ne zaman ve nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 anlamak i\u00e7in zaman ay\u0131rmak gerekmektedir.<\/p>\n<h2>S\u0131k\u00e7a Sorulan Sorular (SSS) ve Yan\u0131tlar\u0131<\/h2>\n<dl>\n<dt><strong>Sinyaller RxJS'in yerini alacak m\u0131?<\/strong><\/dt>\n<dd>Hay\u0131r, Sinyaller RxJS'in yerini almayacak, aksine onunla birlikte var olacak. Sinyaller basit, senkronize reaktif de\u011ferler ve t\u00fcretilmi\u015f durumlar i\u00e7in m\u00fckemmeldir. RxJS ise karma\u015f\u0131k asenkron veri ak\u0131\u015flar\u0131n\u0131, zamanlamay\u0131 ve geli\u015fmi\u015f operat\u00f6r zincirlemelerini y\u00f6netmek i\u00e7in hala en g\u00fc\u00e7l\u00fc ara\u00e7t\u0131r. Angular ekibi, ikisinin birlikte nas\u0131l en iyi \u015fekilde \u00e7al\u0131\u015faca\u011f\u0131n\u0131 kolayla\u015ft\u0131rmak i\u00e7in <code>toSignal()<\/code> ve <code>toObservable()<\/code> gibi yard\u0131mc\u0131 fonksiyonlar sa\u011flam\u0131\u015ft\u0131r.<\/dd>\n<dt><strong>Sinyallerle Zone.js'e ihtiyac\u0131m\u0131z kalacak m\u0131?<\/strong><\/dt>\n<dd>Angular ekibinin uzun vadeli hedefi, tamamen Zone.js'siz Angular uygulamalar\u0131 m\u00fcmk\u00fcn k\u0131lmakt\u0131r ve Sinyaller bu hedefe ula\u015fmada \u00f6nemli bir ad\u0131md\u0131r. \u015eu an i\u00e7in Zone.js hala \u00e7o\u011fu Angular uygulamas\u0131nda kullan\u0131lmaktad\u0131r. Ancak, Sinyaller sayesinde Zone.js'in kapsam\u0131 azalt\u0131labilir ve gelecekte Zone.js olmadan da Angular uygulamalar\u0131 \u00e7al\u0131\u015ft\u0131r\u0131labilir hale gelecektir. Bu da daha iyi performans ve daha k\u00fc\u00e7\u00fck uygulama boyutlar\u0131 anlam\u0131na gelir.<\/dd>\n<dt><strong>Neden <code>effect()<\/code> kullan\u0131rken dikkatli olmal\u0131y\u0131z?<\/strong><\/dt>\n<dd><code>effect()<\/code> fonksiyonlar\u0131 yan etkileri y\u00f6netmek i\u00e7in tasarlanm\u0131\u015ft\u0131r (\u00f6rne\u011fin konsola log yazma, localStorage'a kaydetme, DOM manip\u00fclasyonu). Ancak, bir <code>effect<\/code> i\u00e7inde bir sinyali de\u011fi\u015ftirmek, dikkatli olunmazsa sonsuz d\u00f6ng\u00fclere yol a\u00e7abilir. Bu nedenle, <code>effect<\/code>'lerin amac\u0131 sadece yan etkileri ger\u00e7ekle\u015ftirmek olmal\u0131, yeni bir reaktif durum yaratmak veya bir sinyali g\u00fcncellemek i\u00e7in kullan\u0131lmamal\u0131d\u0131r (istisnai durumlar d\u0131\u015f\u0131nda). Genellikle, UI'daki de\u011ferleri do\u011frudan \u015fablonda g\u00f6stermek veya t\u00fcretilmi\u015f de\u011ferler i\u00e7in <code>computed()<\/code> kullanmak daha g\u00fcvenli ve \u00f6ng\u00f6r\u00fclebilir bir yakla\u015f\u0131md\u0131r.<\/dd>\n<dt><strong>Sinyaller ile state y\u00f6netimi nas\u0131l yap\u0131l\u0131r?<\/strong><\/dt>\n<dd>Sinyaller, uygulaman\u0131n durumunu (state) y\u00f6netmek i\u00e7in olduk\u00e7a etkilidir. Ana bile\u015fende veya bir servis i\u00e7inde <code>signal()<\/code> ile uygulama durumunu tutabilir, <code>computed()<\/code> ile bu durumdan t\u00fcretilmi\u015f yeni de\u011ferler yaratabilir ve <code>effect()<\/code> ile yan etkileri (\u00f6rn. API \u00e7a\u011fr\u0131lar\u0131, localStorage'a kaydetme) y\u00f6netebilirsiniz. Daha karma\u015f\u0131k senaryolarda, Signals tabanl\u0131 bir state y\u00f6netim servisi olu\u015fturabilir veya mevcut NgRx gibi state y\u00f6netim k\u00fct\u00fcphanelerini Signals ile birle\u015ftirebilirsiniz. Sinyaller, hem yerel bile\u015fen durumlar\u0131 hem de global uygulama durumu i\u00e7in basit ve performansl\u0131 bir \u00e7\u00f6z\u00fcm sunar.<\/dd>\n<dt><strong>Sinyaller hangi Angular s\u00fcr\u00fcmlerinde kullan\u0131labilir?<\/strong><\/dt>\n<dd>Angular Signals, Angular'\u0131n 16. s\u00fcr\u00fcm\u00fcyle geli\u015ftirici \u00f6nizlemesi (developer preview) olarak tan\u0131t\u0131ld\u0131 ve 17. s\u00fcr\u00fcm itibar\u0131yla kararl\u0131 bir \u00f6zellik olarak genel kullan\u0131ma sunuldu. Dolay\u0131s\u0131yla, Angular 17 ve sonraki s\u00fcr\u00fcmlerini kullanarak projelerinizde Signals'\u0131 g\u00fcvenle kullanabilirsiniz. \u00d6nceki Angular s\u00fcr\u00fcmleri i\u00e7in bu \u00f6zellik mevcut de\u011fildir.<\/dd>\n<\/dl>\n<p>Angular Signals, reaktif programlamaya modern, verimli ve sezgisel bir yakla\u015f\u0131m getirerek Angular geli\u015ftirme deneyimini yeniden \u015fekillendiriyor. Bu rehberde, temel kavramlardan ger\u00e7ek d\u00fcnya uygulamalar\u0131na, RxJS ile entegrasyondan performans optimizasyonuna kadar Signals'\u0131n bir\u00e7ok y\u00f6n\u00fcn\u00fc ele ald\u0131k. G\u00f6rd\u00fc\u011f\u00fcn\u00fcz gibi, Signals ile daha az kodla daha fazla i\u015f yapabilir, uygulamalar\u0131n\u0131z\u0131n performans\u0131n\u0131 art\u0131rabilir ve daha y\u00f6netilebilir bir kod taban\u0131 olu\u015fturabilirsiniz.<\/p>\n<p>Angular ekibinin gelece\u011fe y\u00f6nelik vizyonunda Signals, Zone.js'siz, daha mod\u00fcler ve daha optimize edilmi\u015f uygulamalar\u0131n temelini olu\u015fturuyor. Bu yeni paradigmay\u0131 benimsemek, hem kariyerinizde hem de projelerinizde size \u00f6nemli avantajlar sa\u011flayacakt\u0131r. Art\u0131k Signals'\u0131 kendi Angular uygulamalar\u0131n\u0131zda denemek ve sundu\u011fu faydalar\u0131 bizzat deneyimlemek i\u00e7in gerekli bilgiye sahipsiniz. Hadi kodlamaya ba\u015flay\u0131n!<\/p>\n<p><\/body><\/p>\n","protected":false},"excerpt":{"rendered":"Angular uygulamalar\u0131n\u0131zda performans ve reaktiviteyi k\u00f6kten de\u011fi\u015ftiren Signals yap\u0131s\u0131n\u0131 merak m\u0131 ediyorsunuz? Bu kapsaml\u0131 rehberde, Angular Signals&#8217;\u0131n ne&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":[1488],"tags":[],"class_list":{"0":"post-32857","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-angular","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 Signals Nedir ve Uygulamada Nas\u0131l Kullan\u0131l\u0131r? (T\u00fcrk\u00e7e Rehber)<\/title>\n<meta name=\"description\" content=\"Angular uygulamalar\u0131n\u0131zda performans ve reaktiviteyi k\u00f6kten de\u011fi\u015ftiren Signals yap\u0131s\u0131n\u0131 merak m\u0131 ediyorsunuz? 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