HTMLSelectElement.autofocus

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HTMLSelectElement.autofocus 特性为 布尔 that reflects the autofocus HTML attribute, which indicates whether the associated <select> element will get input focus when the page loads, unless the user overrides it.

Only one form-associated element in a document can have this attribute specified. If there are several, the first element with the attribute set inserted, usually the first such element on the page, get the initial focus.

Setting this property doesn't set the focus to the associated <select> element: it merely tells the browser to focus to it when the element is inserted in the document. Setting it after the insertion, that is most of the time after the document load, has no visible effect.

句法编辑

aBool = aSelectElement.autofocus; // Get the value of autofocus
aSelectElement.autofocus = aBool; // Set the value of autofocus

范例

HTML

<select id="mySelect" autofocus>
  <option>Option 1</option>
  <option>Option 2</option>
</select>

JavaScript

// Check if the autofocus attribute on the <select>
var hasAutofocus = document.getElementById('mySelect').autofocus;

规范

规范	状态	注释
HTML 实时标准 The definition of 'autofocus' in that specification.	实时标准
HTML 5.2 The definition of 'autofocus' in that specification.	推荐

浏览器兼容性

更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`autofocus`	Chrome Yes	Edge 12	Firefox Yes	IE 10	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android No	Safari iOS No	Samsung Internet Android Yes

图例

完整支持
不支持

元数据

最后修改： May 5, 2020

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句法 编辑

范例

HTML

JavaScript

规范

浏览器兼容性

图例

相关话题

句法编辑