How do I check if a HTML object is null in jQuery?

Question

I'm trying to find an object in HTML with jQuery.

function getHats() {
    $.get('http://www.roblox.com/User.aspx?ID=1',
        function parse(data) {
            var id1 = $(data).find('#ctl00_cphRoblox_rbxUserAssetsPane_UserAssetsDataList_ctl09_AssetThumbnailHyperLink');
            hatname1 = id1.attr('title');
            hatlink1 = "http://www.roblox.com" + id1.attr('href');
            hatpic1 = id1.find('img').attr('src');
            var lim1 = id1.parent('.AssetThumbnail').find('div');
            if(!lim1) {
                hatlim1 = true;
                alert("Null")
            }else{
                hatlim1 = false;
            };
        }
    );
};

It always pops up the alert.

voithos · Accepted Answer · 2012-06-12 02:16:35Z

6

Use length - but you don't have to be explicit about it:

if (lim1.length) {
    // lim1 has a length! And it's not 0!
} else {
    // arg, lim1 has a length of 0
}

Equivalently, the negation operator ! will work fine.

if (!lim1.length) {
    // arg!
}

answered Jun 12, 2012 at 2:16

voithos

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Comments

ahren · Accepted Answer · 2012-06-12 02:14:54Z

3

In this case, you can use length.

if(lim1.length < 1){
    //alert 
}

answered Jun 12, 2012 at 2:14

ahren

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