getelementbyclassname instead of getelementbyid is not working

Question

I have read many times that you can NOW get getElementsByClassName. This below works fine IF I replace ClassName by Id, but using the word ClassName does not work. Anyone know w

Answer 1

The function is called getElementsByClassName. Plural. It returns not an element, but an array of all the elements that have the class name.

So even if the array consists of only one item, even there is only one element in the array, you still need to index it.

 x[0].disabled=true

instead of

 x.disabled=true

Fiddle