---
title: URL.protocol
slug: Web/API/URL/protocol
translation_of: Web/API/URL/protocol
---
<div>{{ApiRef("URL API")}}</div>

<div>{{domxref("URL")}}接口的<strong><code>protocol</code></strong>是一个包含URL协议的{{domxref("USVString")}}值,此值包含协议后的<code>':'</code>.</div>

<p>{{AvailableInWorkers}}</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox"><em>string</em> = <em>object</em>.protocol;
<em>object</em>.protocol = <em>string</em>;
</pre>

<h3 id="参数">参数</h3>

<p>A {{domxref("USVString")}}.</p>

<h2 id="示例">示例</h2>

<pre class="brush: js">var url = new URL('https://developer.mozilla.org/en-US/docs/Web/API/URL/protocol');
var result = url.protocol; // Returns:"https:"
</pre>

<h2 id="规范">规范</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('URL', '#dom-url-protocol', 'protocol')}}</td>
   <td>{{Spec2('URL')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>



<p>{{Compat("api.URL.protocol")}}</p>

<h2 id="其他链接">其他链接</h2>

<ul>
 <li>The {{domxref("URL")}} interface it belongs to.</li>
</ul>