how to change a Css Style Class definition with Javascript?

Question

Is it possible to override the Css Classes with JavaScript ? for exemple :

Adding a background to .iframe style classe.

Do you mean changing the background for _all elements that have the `iframe` class_? Just toggle another class name for those elements and define a CSS rule with the background for only that toggled class. — Sebastian Simon, Sep 30 '15 at 02:18

Filipe Merker · Answer 1 · 2015-09-30T02:34:13.927

-1

Who is the troll

who down voted my answer? Please provide your reason

Changing a STYLE property

var iframe = document.querySelector('.iframe');
iframe.style['marginBottom'] = "200px";

Changing a CLASS property

iframe['className'] = "myClass";

edited Sep 30 '15 at 02:34

answered Sep 30 '15 at 02:27

Filipe Merker

1

Didn't down vote but see e duplicate question what this was really about. – Felix Kling Sep 30 '15 at 03:03