---
title: HTMLSelectElement.setCustomValidity()
slug: Web/API/HTMLSelectElement/setCustomValidity
tags:
  - HTMLSelectElement.setCustomValidity()
translation_of: Web/API/HTMLSelectElement/setCustomValidity
---
<div>{{ APIRef("HTML DOM") }}</div>

<p><code><strong>HTMLSelectElement.setCustomValidity()</strong></code> 方法设置指定的验证消息为选择元素的自定义验证消息。</p>

<p>使用空字符串来表示该元素没有自定义的验证错误。</p>

<h2 id="语法">语法</h2>

<pre class="eval  language-html"><code class="language-html"><em>selectElt</em>.setCustomValidity(<em>string</em>);</code></pre>

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

<ul>
 <li><em>string</em> 将作为错误信息包含到 {{domxref("DOMString")}} 之中。</li>
</ul>

<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('HTML WHATWG', '#dom-cva-setcustomvalidity', 'HTMLSelectElement.setCustomValidity()')}}</td>
   <td>{{Spec2('HTML WHATWG')}}</td>
   <td>No change since the latest snapshot, {{SpecName('HTML5 W3C')}}.</td>
  </tr>
  <tr>
   <td>{{SpecName('HTML5 W3C', 'forms.html#dom-cva-setcustomvalidity', 'HTMLSelectElement.setCustomValidity()')}}</td>
   <td>{{Spec2('HTML5 W3C')}}</td>
   <td>Initial definition, snapshot of {{SpecName('HTML WHATWG')}}</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

{{Compat("api.HTMLSelectElement.setCustomValidity")}}

<h2 id="查看更多">查看更多</h2>

<ul>
 <li><a href="/en-US/docs/Web/Guide/HTML/HTML5/Constraint_validation">Form validation.</a></li>
</ul>