classList

The classList API adds, removes and toggles class names on an element without hand editing className strings. It is available in every current browser and has made the old class manipulation helpers unnecessary.

Verdict

Safe to use

Category

JavaScript APIs

Browser support

Can I Use

Works in

IE10+

Should you use classList in 2026?

classList is well supported nowadays, but expect incomplete support in IE10-11 and Opera Mobile (see caniuse notes).

Polyfills and fallbacks

classlist.js

Browser share on Can I Use Edit on GitHub