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+---
+title: Headers.entries()
+slug: Web/API/Headers/entries
+translation_of: Web/API/Headers/entries
+---
+<p>{{APIRef}}{{SeeCompatTable}}</p>
+
+<p><code><strong>Headers.entries()</strong></code> 以 {{jsxref("Iteration_protocols","迭代器")}} 的形式返回Headers对象中所有的键值对. </p>
+
+<div class="note">
+<p><strong>Note</strong>: 这个方法在 <a href="/en-US/docs/Web/API/Web_Workers_API">Web Workers</a>中是可用的.</p>
+</div>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox">headers.entries();</pre>
+
+<h3 id="Return_value">Return value</h3>
+
+<p>返回一个 {{jsxref("Iteration_protocols","迭代器")}}.</p>
+
+<h2 id="Example">Example</h2>
+
+<pre class="brush: js;highlight:[7]">// Create a test Headers object
+var myHeaders = new Headers();
+myHeaders.append('Content-Type', 'text/xml');
+myHeaders.append('Vary', 'Accept-Language');
+
+// Display the key/value pairs
+for (var pair of myHeaders.entries()) {
+ console.log(pair[0]+ ': '+ pair[1]);
+}
+</pre>
+
+<p>返回结果:</p>
+
+<pre>content-type: text/xml
+vary: Accept-Language</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','#headers-class','Headers.entries() (as iterator&lt;&gt;)')}}</td>
+ <td>{{Spec2('Fetch')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<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</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatGeckoDesktop(44)}}</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>Chrome for Android</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>Firefox OS (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatGeckoMobile(44)}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</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>