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문자

返回值:jQuerykeypress([[data],fn])

概述

触发每一个匹配元素的keypress事件

T这个函数会调用执行绑定到keydown事件的所有函数,包括浏览器的默认行为。可以通过在某个绑定的函数中返回false来防止触发浏览器的默认行为。keydown事件会在键盘按下时触发

参数

fnFunctionV1.0

在每一个匹配元素的keypress事件中绑定的处理函数。

[data],fnString,FunctionV1.4.3

data:keypress([Data], fn) 可传入data供函数fn处理。

fn:在每一个匹配元素的keypress事件中绑定的处理函数。

示例

描述:

计算在输入域中的按键次数:

jQuery 代码:
$("input").keydown(function(){
$("span").text(i+=1);
});
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