Check if Attribute('id') Exists in jQuery

Question

How can I check if an attribute Id exists in jQuery?

I searched around and found that this should work:

if ($(this).attr('id').attr('id'))
{

}

I still get this error: TypeError: Object gauge1 has no method 'attr'

Answer 1

This itself will work:

if($(this).attr("id"))

Check existing jsfiddle on the issue: http://jsfiddle.net/rwaldron/wVqvr/4/

Answer 2

Just try it the old way

if (this.id) { 
    //do something
}