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返回值:jQuerykeydown([[data],fn])

概述

觸發(fā)每一個匹配元素的keydown事件

這個函數(shù)會調(diào)用執(zhí)行綁定到keydown事件的所有函數(shù),包括瀏覽器的默認行為??梢酝ㄟ^在某個綁定的函數(shù)中返回false來防止觸發(fā)瀏覽器的默認行為。keydown事件會在鍵盤按下時觸發(fā)。

參數(shù)

fnFunctionV1.0

在每一個匹配元素的keydown事件中綁定的處理函數(shù)。

[data],fnString,FunctionV1.4.3

data:keydown([Data], fn) 可傳入data供函數(shù)fn處理。

fn:在每一個匹配元素的keydown事件中綁定的處理函數(shù)。

示例

描述:

在頁面內(nèi)對鍵盤按鍵做出回應,可以使用如下代碼:

jQuery 代碼:
$(window).keydown(function(event){
  switch(event.keyCode) {
    // ...
    // 不同的按鍵可以做不同的事情
    // 不同的瀏覽器的keycode不同
    // 更多詳細信息:     http://unixpapa.com/js/key.html
    // ...
  }
});
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