this.id vs. $(this).attr('id')

Question

Is

$(this).attr(\'id\') 

the same as:

this.id

Answer 1

Almost (see Jeff's answer).

jQuery abstracts away attribute getting, but it isn't always the most terse option.

It is however shorter than getAttribute('id').

Answer 2

No, they're not exactly the same.

They'll both return the element's ID, but if the element has no ID, then this.id will return a blank string while $(this).attr("id") will return undefined.

Answer 3

Same result, but this.id is much faster as it doesn't require all the jQuery stuff around it. You will also get different results if that item doesn't have an id.