jQuery错误-无法调用未定义的方法'indexOf' [英] jQuery Error - Cannot call method 'indexOf' of undefined

问题描述

我有以下代码可解决z-index中所有内容的Flash跳动问题:

I have this code to fix the issue of flash hopping over all your content in the z-index:

$("iframe").each(function(){
    var ifr_source = $(this).attr('src');
    var wmode = "wmode=opaque";
    if(ifr_source.indexOf('?') != -1) {
        var getQString = ifr_source.split('?');
        var oldString = getQString[1];
        var newString = getQString[0];
        $(this).attr('src',newString+'?'+wmode+'&'+oldString);
    }
    else $(this).attr('src',ifr_source+'?'+wmode);
});

由于某种原因，我在indexOf上遇到错误，并且该站点中断了.但是奇怪的是，它并没有完全打破它，只是我在上面的一个CSS调整大小的修复程序.

For some reason, i'm getting errors on the indexOf, and it's breaking the site. But oddly, it's not breaking it entirely, just one css resize fix I have on there.

未捕获的TypeError:无法调用未定义的方法'indexOf'

Uncaught TypeError: Cannot call method 'indexOf' of undefined

站点在这里: http://syndex.me

很想知道为什么会这样.

Would love to know why this is happening.

推荐答案

直接从this获取src.您无需为此创建整个jQuery对象.

Get the src directly from this. You do not need to create a whole jQuery object for this.

ifr_source = this.src;

作为奖励，即使未设置属性src，this.src也会返回一个空字符串，而jQuery的attr返回undefined，您必须在使用indexOf之前执行检查.

As a bonus, this.src returns an empty string even if the attribute src is not set, whereas jQuery's attr returns undefined and you have to perform a check before using indexOf.

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