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+---
+title: SourceMap
+slug: Web/HTTP/Headers/SourceMap
+translation_of: Web/HTTP/Headers/SourceMap
+---
+<div> {{HTTPSidebar}}</div>
+
+<p>The <strong><code>SourceMap</code></strong> <a href="/en-US/docs/Web/HTTP">HTTP</a> response header links generated code to a <a href="/en-US/docs/Tools/Debugger/How_to/Use_a_source_map">source map</a>, enabling the browser to reconstruct the original source and present the reconstructed original in the debugger.</p>
+
+<table class="properties">
+ <tbody>
+  <tr>
+   <th scope="row">Header type</th>
+   <td>{{Glossary("Response header")}}</td>
+  </tr>
+  <tr>
+   <th scope="row">{{Glossary("Forbidden header name")}}</th>
+   <td>no</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox">SourceMap: &lt;url&gt;
+X-SourceMap: &lt;url&gt; (deprecated)
+</pre>
+
+<h3 id="Diretivas">Diretivas</h3>
+
+<dl>
+ <dt><code>&lt;url&gt;</code></dt>
+ <dd>A relative (to the request URL) or absolute URL pointing to a source map file.</dd>
+</dl>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<pre>SourceMap: /path/to/file.js.map</pre>
+
+<h2 id="Especificações">Especificações</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Especificação</th>
+   <th scope="col">Titulo</th>
+  </tr>
+  <tr>
+   <td><a href="https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k">Draft document</a></td>
+   <td>Source Map Revision 3 Proposal</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p class="hidden">A Tabela de compatibilidade nesta página é gerada de dados estruturados.If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("http.headers.SourceMap")}}</p>
+
+<h2 id="Veja_Também">Veja Também</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Tools/Debugger/How_to/Use_a_source_map">Firefox Developer Tools: using a source map</a></li>
+</ul>