使用window.onload超过1次 [英] Using window.onload more than 1 times

问题描述

如果我写这个

$(document).ready( function () { 
    alert("bla1");
});


$(document).ready( function () { 
    alert("bla2");
});

所有好，两个警报发生，但如果代码是

All good, two alert occurs, but if code is

window.onload = function () {
    alert("bla1");
}


window.onload = function () {
    alert("bla2");
}

第二次警报未发生，请告诉某人，为何2或更多 window.onload 是错误的？

second alert not happened, tell someone please, why 2 or more window.onload is wrong?

推荐答案

你为它指定了一些东西。然后你为它分配一些其他内容并覆盖之前的内容。

You assign something to it. You then assign something else to it and overwrite what is there before.

foo = 1;
foo = 2;
// foo is now "2" it is not "1" and "2"

如果要非破坏性地分配事件处理程序，请使用 的addEventListener 。您需要使用兼容性方法来支持Old-IE。这些方法通过 on 方法。

If you want to assign event handlers non-destructively, use addEventListener. You will need to use compatibility methods to support Old-IE. Such methods are built into jQuery via the on method.

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