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jQuery keydown() 方法

❮ jQuery 事件方法

示例

当按下键盘按键时,设置<input>字段的背景颜色

$("input").keydown(function(){
  $("input").css("background-color", "yellow");
});
亲自试一试 »

定义和用法

与 keydown 事件相关的事件顺序

  1. keydown - 键向下按下
  2. keypress - 键被按下
  3. keyup - 键被释放

当按下键盘按键时,会发生 keydown 事件。

keydown() 方法触发 keydown 事件,或者附加一个函数,在发生 keydown 事件时运行。

提示: 使用 event.which 属性来返回哪个键盘键被按下。


语法

为选定的元素触发 keydown 事件

$(选择器).keydown() 试一试

将函数附加到 keydown 事件

$(选择器).keydown(函数) 试一试

参数 描述
function 可选。指定在触发 keydown 事件时要运行的函数

亲自试一试 - 示例

确定哪个键被按下
如何使用 event.which 属性来确定哪个键被按下。


❮ jQuery 事件方法

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