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+---
+title: DOMStringMap
+slug: Web/API/DOMStringMap
+translation_of: Web/API/DOMStringMap
+---
+<p>{{ APIRef("HTML DOM") }}</p>
+
+<p>Usado pelo atributo HTML {{ htmlattrxref("dataset") }} para representar atributos próprios adicionados ao elemento.</p>
+
+<h2 id="Method_overview" name="Method_overview">Visão Geral do Método</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <td><code>DOMString <a href="#getDataAttr()">getDataAttr</a>(in DOMString prop);</code></td>
+  </tr>
+  <tr>
+   <td><code>boolean <a href="#hasDataAttr()">hasDataAttr</a>(in DOMString prop);</code></td>
+  </tr>
+  <tr>
+   <td><code>void <a href="#removeDataAttr()">removeDataAttr</a>(in DOMString prop);</code></td>
+  </tr>
+  <tr>
+   <td><code>void <a href="#removeProp()">removeProp</a>(in nsIAtom attr);</code></td>
+  </tr>
+  <tr>
+   <td><code>void <a href="#setDataAttr()">setDataAttr</a>(in DOMString prop, in DOMString value);</code></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Methods" name="Methods">Métodos</h2>
+
+<h3 id="hasDataAttr()">hasDataAttr()</h3>
+
+<pre class="eval">boolean hasDataAttr(
+  in DOMString prop
+);
+</pre>
+
+<h6 id="Parameters" name="Parameters">Parâmetros</h6>
+
+<dl>
+ <dt><code>prop</code></dt>
+ <dd>Nome da propriedade a qual a existência deve ser verificada.</dd>
+</dl>
+
+<h6 id="Return_value" name="Return_value">Retorno</h6>
+
+<p><code>true</code> se a propriedade existir ou <code>false</code> se não existir.</p>
+
+<h3 id="removeDataAttr()">removeDataAttr()</h3>
+
+<pre class="eval">void removeDataAttr(
+  in DOMString prop
+);
+</pre>
+
+<h6 id="Parameters" name="Parameters">Parâmetros</h6>
+
+<dl>
+ <dt><code>prop</code></dt>
+ <dd>Propriedade a ser removida do data set.</dd>
+</dl>
+
+<h3 id="removeProp()">removeProp()</h3>
+
+<p>Remove a propriedade do dataset do objeto. Usada para atualizar o objeto de dataset do objeto quando o atributo data-* houver sido removido do elemento.</p>
+
+<pre class="eval">void removeProp(
+  in nsIAtom attr
+);
+</pre>
+
+<h6 id="Parameters" name="Parameters">Parâmetros</h6>
+
+<dl>
+ <dt><code>attr</code></dt>
+ <dd>A propriedade a ser removida do dataset.</dd>
+</dl>
+
+<h2 id="Compatibilidade">Compatibilidade</h2>
+
+<p>{{ CompatibilityTable() }}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Suporte básico</td>
+   <td>{{ CompatUnknown() }}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{ CompatGeckoDesktop("6.0") }}</td>
+   <td>{{ CompatUnknown() }}</td>
+   <td>{{ CompatUnknown() }}</td>
+   <td>{{ CompatUnknown() }}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Suporte básico</td>
+   <td>{{ CompatUnknown() }}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{ CompatUnknown() }}</td>
+   <td>{{ CompatUnknown() }}</td>
+   <td>{{ CompatUnknown() }}</td>
+   <td>{{ CompatUnknown() }}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Veja_também">Veja também</h2>
+
+<ul>
+ <li>{{ domxref("HTMLElement.dataset") }}</li>
+ <li>{{ htmlattrxref("dataset") }}</li>
+</ul>