---
title: WebSocket.onerror
slug: Web/API/WebSocket/onerror
translation_of: Web/API/WebSocket/onerror
---
<p>{{APIRef("Web Sockets API")}}</p>

<p>The <strong><code>WebSocket.onerror</code></strong> property returns the event listener to be called when an error occurs. This is a simple event named "error".</p>

<p>在 <strong><code>WebSocket.onerror </code></strong>属性中，你可以定义一个发生错误时执行的回调函数，此事件的事件名为"error"</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox"><em>WebSocket</em>.onerror = function(event) {
  console.error("WebSocket error observed:", event);
};</pre>

<h2 id="值">值</h2>

<p>An {{domxref("EventListener")}}.</p>

<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{SpecName('HTML WHATWG', '#handler-websocket-onerror', 'WebSocket: onerror')}}</td>
   <td>{{Spec2('HTML WHATWG')}}</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.WebSocket.onerror")}}</p>