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jQuery 回调 函数


回调函数在当前效果 100% 完成后执行。


jQuery 回调函数

JavaScript 语句一行一行执行。但是,对于效果来说,即使效果未完成,下一行代码也可能会运行。这可能会导致错误。

为了防止这种情况,您可以创建一个回调函数。

回调函数在当前效果完成后执行。

典型语法:$(选择器).hide(速度,回调);

实例

下面的示例有一个回调参数,该参数是一个函数,将在隐藏效果完成后执行

带回调的示例

$("button").click(function(){
  $("p").hide("slow", function(){
    alert("段落现在已隐藏");
  });
});
亲自试一试 »

下面的示例没有回调参数,并且警报框将在隐藏效果完成前显示

不带回调的示例

$("button").click(function(){
  $("p").hide(1000);
  alert("段落现在已隐藏");
});
亲自试一试 »

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