How can I erase all inline styles with javascript and leave only the styles specified in the css style sheet?

Question

If I have the following in my html:

And this in my c

Answer 1

This can be accomplished in two steps:

1: select the element you want to change by either tagname, id, class etc.

var element = document.getElementsByTagName('h2')[0];

2. remove the style attribute

element.removeAttribute('style');