---
title: Headers.delete()
slug: Web/API/Headers/delete
translation_of: Web/API/Headers/delete
---
<p>{{APIRef("Fetch")}}{{ SeeCompatTable() }}</p>

<p><strong><code>delete()</code></strong> 方法可以从Headers对象中删除指定header.</p>

<p>下列原因将会导致该方法抛出一个<span style="line-height: 19.0909080505371px;">{{jsxref("TypeError")}}:</span></p>

<ul>
 <li><span style="line-height: 19.0909080505371px;">header名在HTTP header中是不存在的.</span></li>
 <li><span style="line-height: 19.0909080505371px;"><span style="line-height: 19.0909080505371px;">header被锁定了.<span style="line-height: 19.0909080505371px;"><span style="line-height: 19.0909080505371px;">​</span></span></span></span></li>
</ul>

<div class="note">
<p style="line-height: 19.0909080505371px;"><strong>Note:</strong>出于安全原因, 部分头信息只能被用户代理控制. 这些头信息包括 {{Glossary("Forbidden_header_name", "forbidden header names", 1)}}  和 {{Glossary("Forbidden_response_header_name", "forbidden response header names", 1)}}.</p>
</div>

<p style="line-height: 19.0909080505371px;"><strong style="font-size: 2.14285714285714rem; font-weight: 700; letter-spacing: -1px; line-height: 30px;">Syntax</strong></p>

<pre class="brush: js">myHeaders.delete(name);</pre>

<h3 id="Parameters">Parameters</h3>

<dl>
 <dt><em>name</em></dt>
 <dd>需删除的HTTP header名称.</dd>
</dl>

<h3 id="Returns">Returns</h3>

<p>Void.</p>

<h2 id="Example">Example</h2>

<p>创建一个空的Headers对象:</p>

<pre class="brush: js">var myHeaders = new Headers(); // Currently empty</pre>

<p>可以通过append()方法添加header:</p>

<pre class="brush: js">myHeaders.append('Content-Type', 'image/jpeg');
myHeaders.get('Content-Type'); // Returns 'image/jpeg'
</pre>

<p>可以通过delete()方法删除已有header:</p>

<pre class="brush: js">myHeaders.delete('Content-Type');
myHeaders.get('Content-Type'); // Returns null, as it has been deleted</pre>

<h2 id="Specifications">Specifications</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('Fetch','#dom-headers-delete','delete()')}}</td>
   <td>{{Spec2('Fetch')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

<p>{{ CompatibilityTable() }}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari (WebKit)</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{ CompatChrome(42) }}<br>
    {{ CompatChrome(41) }} behind pref<br>
     </td>
   <td>{{ CompatGeckoDesktop(39)}}<br>
    34 behind pref</td>
   <td>{{ CompatNo }}</td>
   <td>
    <p>29<br>
     28 behind pref</p>
   </td>
   <td>{{ CompatNo }}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>Firefox OS (Gecko)</th>
   <th>IE Phone</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
   <th>Chrome for Android</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{ CompatNo }}</td>
   <td>{{ CompatNo }}</td>
   <td>{{ CompatNo }}</td>
   <td>{{ CompatNo }}</td>
   <td>{{ CompatNo }}</td>
   <td>{{ CompatNo }}</td>
   <td>{{ CompatNo }}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="See_also">See also</h2>

<ul>
 <li><a href="/en-US/docs/Web/API/ServiceWorker_API">ServiceWorker API</a></li>
 <li><a href="/en-US/docs/Web/HTTP/Access_control_CORS">HTTP access control (CORS)</a></li>
 <li><a href="/en-US/docs/Web/HTTP">HTTP</a></li>
</ul>