JS: Failed to execute 'getComputedStyle' on 'Window': parameter is not of type 'Element'

Question

In short: I am trying to understand the meaning of this TypeError: Failed to execute \'getComputedStyle\' on \'Window\': parameter 1 is not of type \'Element\' The error app

Answer 1

I had this same error showing. When I replaced jQuery selector with normal JavaScript, the error was fixed.

var this_id = $(this).attr('id');

Replace:

getComputedStyle( $('#'+this_id)[0], "")

With:

getComputedStyle( document.getElementById(this_id), "")