概述
HTMLElement.focus()
方法可以设置指定元素获取焦点。
语法
element.focus();
示例
text输入框获取焦点
JavaScript
focusMethod = function getFocus() {
document.getElementById("myTextField").focus();
}
HTML
<input type="text" id="myTextField" value="Text field.">
<p></p>
<button type="button" onclick="focusMethod()">点击我让输入框获取焦点</button>
Result
按钮获取焦点
JavaScript
focusMethod = function getFocus() {
document.getElementById("myButton").focus();
}
HTML
<button type="button" id="myButton">Click Me!</button>
<p></p>
<button type="button" onclick="focusMethod()">点击我让按钮获取焦点</button>
Result
规范
Specification | Status | Comment |
---|---|---|
WHATWG HTML Living Standard focus |
Living Standard | |
HTML5.1 focus |
Recommendation | |
HTML5 focus |
Recommendation | |
Document Object Model (DOM) Level 2 HTML Specification focus |
Recommendation | |
Document Object Model (DOM) Level 1 Specification focus |
Recommendation |
提示
如果点击事件使用HTMLElement.focus()方法,需要使用event.preventDefault()来让焦点移除当前dom。
规范
DOM Level 1 HTML: various elements.focus
DOM Level 2 HTML: various elements.focus