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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:52 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:52 -0500
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+---
+title: WeakSet.prototype.add()
+slug: Web/JavaScript/Reference/Global_Objects/WeakSet/add
+tags:
+ - ECMAScript6
+ - JavaScript
+ - Method
+ - Prototype
+ - WeakSet
+translation_of: Web/JavaScript/Reference/Global_Objects/WeakSet/add
+---
+<div>{{JSRef("Global_Objects", "WeakSet")}}</div>
+
+<p>Метод <code><strong>add()</strong></code> добавляет новый объект в конец объекта WeakSet.</p>
+
+<h2 id="Syntax" name="Syntax">Синтаксис</h2>
+
+<pre class="syntaxbox"><code><em>ws</em>.add(value);</code>
+</pre>
+
+<h3 id="Parameters" name="Parameters">Параметры</h3>
+
+<dl>
+ <dt>value</dt>
+ <dd>Обязателен. Объект, добавляемый в WeakSet.</dd>
+</dl>
+
+<h2 id="Examples" name="Examples">Примеры</h2>
+
+<h3 id="Example:Using_the_add_method" name="Example:Using_the_add_method">Использование метода add</h3>
+
+<pre class="brush: js">var ws = new WeakSet();
+
+ws.add(window); // добавляет объект window в WeakSet
+
+ws.has(window); // true
+
+// Weakset принимает в качестве параметров только объекты
+ws.add(1);
+// результат в Chrome: "TypeError: Invalid value used in weak set"
+// результат в Firefox: "TypeError: 1 is not a non-null object" </pre>
+
+<h2 id="Specifications" name="Specifications">Спецификации</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-weakset.prototype.add', 'WeakSet.prototype.add')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td>Изначальное определение.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-weakset.prototype.add', 'WeakSet.prototype.add')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">Совместимость с браузерами</h2>
+
+<p>{{Compat("javascript.builtins.WeakSet.add")}}</p>
+
+<div id="compat-mobile"> </div>
+
+<h2 id="See_also" name="See_also">Смотрите также</h2>
+
+<ul>
+ <li>{{jsxref("WeakSet")}}</li>
+ <li>{{jsxref("WeakSet.prototype.delete()")}}</li>
+ <li>{{jsxref("WeakSet.prototype.has()")}}</li>
+</ul>