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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: WeakMap.prototype.set()
+slug: Web/JavaScript/Reference/Global_Objects/WeakMap/set
+translation_of: Web/JavaScript/Reference/Global_Objects/WeakMap/set
+---
+<div>{{JSRef}}</div>
+
+<p>O método <strong><code>set()</code></strong> adiciona um novo elemento com a <code>chave</code> e o <code>valor</code> especificados em um objeto <code>WeakMap</code>.</p>
+
+<div>{{EmbedInteractiveExample("pages/js/weakmap-prototype-set.html")}}</div>
+
+
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox"><code><em>wm</em>.set(chave, valor);</code></pre>
+
+<h3 id="Parâmetros">Parâmetros</h3>
+
+<dl>
+ <dt>chave</dt>
+ <dd>Obrigatório. A chave do elemento a ser adicionado no objeto <code>WeakMap</code>.</dd>
+ <dt>valor</dt>
+ <dd>Obrigatório. O valor do elemento a ser adicionado no objeto <code>WeakMap</code>.</dd>
+</dl>
+
+<h3 id="Valor_de_retorno">Valor de retorno</h3>
+
+<p>O objeto <code>WeakMap</code>.</p>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<h3 id="Utilizando_o_método_set">Utilizando o método <code>set</code> </h3>
+
+<pre class="brush: js">var wm = new WeakMap();
+var obj = {};
+
+// Adicionar novos elementos ao WeakMap
+wm.set(obj, 'foo').set(window, 'bar'); // encadeável
+
+// Atualizar um elemento no WeakMap
+wm.set(obj, 'baz');
+</pre>
+
+<h2 id="Especificações">Especificações</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('ES2015', '#sec-weakmap.prototype.set', 'WeakMap.prototype.set')}}</td>
+ <td>{{Spec2('ES2015')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-weakmap.prototype.set', 'WeakMap.prototype.set')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilidade_de_navegadores">Compatibilidade de navegadores</h2>
+
+
+
+<p>{{Compat("javascript.builtins.WeakMap.set")}}</p>
+
+<h2 id="Notas_específicas_ao_Firefox">Notas específicas ao Firefox</h2>
+
+<ul>
+ <li>Antes do Firefox 33 {{geckoRelease("33")}}, <code>WeakMap.prototype.set</code> retornava <code>undefined</code> e, portanto, não era encadeável. Isso foi resolvido ({{bug(1031632)}}). O comportamento também podia ser encontrado no Chrome/v8 (<a href="https://code.google.com/p/v8/issues/detail?id=3410">issue</a>).</li>
+</ul>
+
+<h2 id="Ver_também">Ver também</h2>
+
+<ul>
+ <li>{{jsxref("WeakMap")}}</li>
+ <li>{{jsxref("WeakMap.prototype.get()")}}</li>
+ <li>{{jsxref("WeakMap.prototype.has()")}}</li>
+</ul>