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diff --git a/files/tr/web/javascript/reference/operators/super/index.html b/files/tr/web/javascript/reference/operators/super/index.html new file mode 100644 index 0000000000..3dd3f62ebf --- /dev/null +++ b/files/tr/web/javascript/reference/operators/super/index.html @@ -0,0 +1,165 @@ +--- +title: super +slug: Web/JavaScript/Reference/Operatörler/super +translation_of: Web/JavaScript/Reference/Operators/super +--- +<div>{{jsSidebar("Operators")}}</div> + +<p><strong>super, </strong>ebeveyn sınıftaki fonksiyonlara ulaşmak ve onları çağırmak için kullanılan bir ifadedir.</p> + +<p>The <code>super.prop</code> and <code>super[expr]</code> expressions are valid in any <a href="/en-US/docs/Web/JavaScript/Reference/Functions/Method_definitions">method definition</a> in both <a href="/en-US/docs/Web/JavaScript/Reference/Classes">classes</a> and <a href="/en-US/docs/Web/JavaScript/Reference/Operators/Object_initializer">object literals</a>.</p> + +<h2 id="Sözdizimi_Syntax">Sözdizimi (Syntax)</h2> + +<pre class="syntaxbox notranslate">super([arguments]); // ebeveyn sınıfın constructot'ını çağırır. +super.functionOnParent([arguments]); // ebeveyn sınıftaki functionOnParent fonksiyonunu çalıştırır. +</pre> + +<h2 id="Açıklama">Açıklama</h2> + +<p>Constructor içinde <code>super</code> ifadesi tek başına kullanılır ve <code>this</code> ifadesinden önce kullanılması zorunludur. Aynı zamanda <code>super</code> ifadesi ebeveyn sınıftaki fonksiyonları çağırmak için de kullanılabilir.</p> + +<h2 id="Örnekler">Örnekler</h2> + +<h3 id="Sınflarda_super_kullanımı">Sınflarda <code>super</code> kullanımı</h3> + +<p>This code snippet is taken from the <a href="https://github.com/GoogleChrome/samples/blob/gh-pages/classes-es6/index.html">classes sample</a> (<a href="https://googlechrome.github.io/samples/classes-es6/index.html">live demo</a>). Here <code>super()</code> is called to avoid duplicating the constructor parts' that are common between <code>Rectangle</code> and <code>Square</code>.</p> + +<pre class="brush: js notranslate">class Rectangle { + constructor(height, width) { + this.name = 'Rectangle'; + this.height = height; + this.width = width; + } + sayName() { + console.log('Hi, I am a ', this.name + '.'); + } + get area() { + return this.height * this.width; + } + set area(value) { + this._area = value; + } +} + +class Square extends Rectangle { + constructor(length) { + this.height; // ReferenceError, super needs to be called first! + + // Here, it calls the parent class's constructor with lengths + // provided for the Rectangle's width and height + super(length, length); + + // Note: In derived classes, super() must be called before you + // can use 'this'. Leaving this out will cause a reference error. + this.name = 'Square'; + } +}</pre> + +<h3 id="Super-calling_static_methods">Super-calling static methods</h3> + +<p>You are also able to call super on <a href="/en-US/docs/Web/JavaScript/Reference/Classes/static">static</a> methods.</p> + +<pre class="brush: js notranslate">class Rectangle { + static logNbSides() { + return 'I have 4 sides'; + } +} + +class Square extends Rectangle { + static logDescription() { + return super.logNbSides() + ' which are all equal'; + } +} +Square.logDescription(); // 'I have 4 sides which are all equal' +</pre> + +<h3 id="Deleting_super_properties_will_throw_an_error">Deleting super properties will throw an error</h3> + +<p>You cannot use the <a href="/en-US/docs/Web/JavaScript/Reference/Operators/delete">delete operator</a> and <code>super.prop</code> or <code>super[expr]</code> to delete a parent class' property, it will throw a {{jsxref("ReferenceError")}}.</p> + +<pre class="brush: js notranslate">class Base { + foo() {} +} +class Derived extends Base { + delete() { + delete super.foo; // this is bad + } +} + +new Derived().delete(); // ReferenceError: invalid delete involving 'super'. </pre> + +<h3 id="super.prop_cannot_overwrite_non-writable_properties"><code>super.prop</code> cannot overwrite non-writable properties</h3> + +<p>When defining non-writable properties with e.g. {{jsxref("Object.defineProperty")}}, <code>super</code> cannot overwrite the value of the property.</p> + +<pre class="brush: js notranslate">class X { + constructor() { + Object.defineProperty(this, 'prop', { + configurable: true, + writable: false, + value: 1 + }); + } +} + +class Y extends X { + constructor() { + super(); + } + foo() { + super.prop = 2; // Cannot overwrite the value. + } +} + +var y = new Y(); +y.foo(); // TypeError: "prop" is read-only +console.log(y.prop); // 1 +</pre> + +<h3 id="Using_super.prop_in_object_literals">Using <code>super.prop</code> in object literals</h3> + +<p>Super can also be used in the <a href="/en-US/docs/Web/JavaScript/Reference/Operators/Object_initializer">object initializer / literal</a> notation. In this example, two objects define a method. In the second object, <code>super</code> calls the first object's method. This works with the help of {{jsxref("Object.setPrototypeOf()")}} with which we are able to set the prototype of <code>obj2</code> to <code>obj1</code>, so that <code>super</code> is able to find <code>method1</code> on <code>obj1</code>.</p> + +<pre class="brush: js notranslate">var obj1 = { + method1() { + console.log('method 1'); + } +} + +var obj2 = { + method2() { + super.method1(); + } +} + +Object.setPrototypeOf(obj2, obj1); +obj2.method2(); // logs "method 1" +</pre> + +<h2 id="Özellikler">Özellikler</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">Specification</th> + </tr> + </thead> + <tbody> + <tr> + <td>{{SpecName('ESDraft', '#sec-super-keyword', 'super')}}</td> + </tr> + </tbody> +</table> + +<h2 id="Tarayıcı_uyumluluğu">Tarayıcı uyumluluğu</h2> + + + +<p>{{Compat("javascript.operators.super")}}</p> + +<h2 id="Ayrıca_bakınız">Ayrıca bakınız</h2> + +<ul> + <li><a href="/en-US/docs/Web/JavaScript/Reference/Classes">Classes</a></li> +</ul> |