How to check if 'this' has a specific attribute?

Question

I want to check if the element I click (this) has a specific attribute, as a condition in the if clause. Is it possible to do this with JavaScript or jQuery?

Thanks

Answer 1

I will give the non-jQuery answer, just for kicks and giggles.

this.hasAttribute("foo")

Documentation: https://developer.mozilla.org/en/DOM/element.hasAttribute

Answer 2

In JavaScript, anything that is null or undefined (or even an empty string) is implicitly "false" so you can do this (assuming that you were referring to a HTML attribute using jQuery):

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

}

Also, if you need the value from the attribute you can do this:

var foo;
if (foo = $(this).attr('foo')) {
    // use "foo" in here
}