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+---
+title: GlobalEventHandlers.oninvalid
+slug: Web/API/GlobalEventHandlers/oninvalid
+tags:
+  - API
+  - GlobalEventHandlers
+  - 事件句柄
+  - 属性
+  - 引用
+translation_of: Web/API/GlobalEventHandlers/oninvalid
+---
+<div>{{ ApiRef("HTML DOM") }}</div>
+
+<p>{{domxref("GlobalEventHandlers")}} 混合的<code><strong>oninvalid</strong></code>属性 是 {{domxref("EventHandler")}} 处理{{event("invalid")}} 事件。</p>
+
+<p><code>invalid</code> 事件被触发当一个从属元素被勾选checked 并且与之前的选中方式不同。 有效的从属元素在表单之前被选中, 或者在 <code><a href="/en-US/docs/Learn/HTML/Forms/Form_validation">checkValidity()</a></code> 方法之后它自己的表单被调用。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><em>target</em>.oninvalid = <em>functionRef</em>;
+var <em>functionRef</em> = <em>target</em>.oninvalid;
+</pre>
+
+<h3 id="值">值</h3>
+
+<p><code>functionRef</code>是一个函数名称 或者 称为 函数表达式。这个函数需要{{domxref("Event")}} 对象做为它的参数。</p>
+
+<h2 id="例子">例子</h2>
+
+<p>这个例子用一个表单说明<code>oninvalid</code> 和 {{domxref("GlobalEventHandlers.onsubmit", "onsubmit")}} 事件 句柄。</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="结果">结果</h3>
+
+<p>{{EmbedLiveSample("Example")}}</p>
+
+<h2 id="说明">说明</h2>
+
+<table class="spectable standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">说明</th>
+   <th scope="col">状态</th>
+   <th scope="col">注释</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('HTML WHATWG','#handler-oninvalid','oninvalid')}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="支持的浏览器">支持的浏览器</h2>
+
+<div class="hidden">这个兼容性表格是通过一组结构化数据生成的。如果你想贡献自己的数据，请下载并提交<a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a>。</div>
+
+<p>{{Compat("api.GlobalEventHandlers.oninvalid")}}</p>
+
+<h2 id="请参阅">请参阅</h2>
+
+<ul>
+ <li>{{event("invalid")}} event</li>
+ <li><a href="/en-US/docs/Web/Guide/Events/Event_handlers" title="/en-US/docs/Web/Guide/DOM/Events/Event_handlers">DOM on-event handlers</a></li>
+</ul>