---
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>