files/zh-cn/web/api/globaleventhandlers/onsubmit/index.html


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---
title: GlobalEventHandlers.onsubmit
slug: Web/API/GlobalEventHandlers/onsubmit
tags:
  - API
  - DOM
  - Event
  - Event Handler
  - HTML
  - 事件
  - 事件接收器
  - 属性
translation_of: Web/API/GlobalEventHandlers/onsubmit
---
<div>{{ ApiRef("HTML DOM") }}</div>

<p>{{domxref("GlobalEventHandlers")}} 的 <code><strong>onsubmit</strong></code> 属性是一个处理 {{event("submit")}} 的 {{domxref("EventHandler")}}。</p>

<p><code>submit</code> 事件会在用户点击提交按钮（<code>&lt;input type="submit"/&gt;</code> 元素）提交表单时触发。</p>

<h2 id="Syntax" name="Syntax">语法</h2>

<pre class="syntaxbox"><em>target</em>.onsubmit = <em>functionRef</em>;</pre>

<h3 id="参数">参数</h3>

<p><code>functionRef</code> 是一个函数名或 <a href="/xh-CN/docs/Web/JavaScript/Reference/Operators/function">函数表达式</a>。The function receives a {{domxref("FocusEvent")}} object as its sole argument.</p>


<h2 id="例子">例子</h2>

<p>This example demonstrates {{domxref("GlobalEventHandlers.oninvalid", "oninvalid")}} and <code>onsubmit</code> event handlers on a form.</p>

<h3 id="HTML">HTML</h3>

<pre class="brush: html">&lt;form id="form"&gt;
  &lt;p id="error" hidden&gt;Please fill out all fields.&lt;/p&gt;

  &lt;label for="city"&gt;City&lt;/label&gt;
  &lt;input type="text" id="city" required&gt;

  &lt;button type="submit"&gt;Submit&lt;/button&gt;
&lt;/form&gt;
&lt;p id="thanks" hidden&gt;Your data has been received. Thanks!&lt;/p&gt;</pre>

<h3 id="JavaScript">JavaScript</h3>

<pre class="brush: js">const form = document.getElementById('form');
const error = document.getElementById('error');
const city = document.getElementById('city');
const thanks = document.getElementById('thanks');

city.oninvalid = invalid;
form.onsubmit = submit;

function invalid(event) {
  error.removeAttribute('hidden');
}

function submit(event) {
  form.setAttribute('hidden', '');
  thanks.removeAttribute('hidden');

  // For this example, don't actually submit the form
  event.preventDefault();
}</pre>

<h3 id="Result">Result</h3>

<p>{{EmbedLiveSample("Example")}}</p>

<h2 id="规范">规范</h2>

<table class="spectable standard-table">
 <tbody>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">备注</th>
  </tr>
  <tr>
   <td>{{SpecName('HTML WHATWG','webappapis.html#handler-onsubmit','onsubmit')}}</td>
   <td>{{Spec2('HTML WHATWG')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

<div>


<p>{{Compat("api.GlobalEventHandlers.onsubmit")}}</p>
</div>

<h2 id="参见">参见</h2>

<ul>
 <li>{{event("submit")}} 事件</li>
</ul>