A classList-like API that's purely based on reading/writing the class attribute.

Because apparently touching the classList API for a node causes a DOMTokenList to be allocated for that node indefinitely. Like you may be asking the classList API to delete a class from a node that perhaps doesn't even have classes to begin with, and that will still allocate a DOMTokenList for that node, which sounds like nonsense to me.

Also sometimes the classList API pointlessly triggers MutationObservers even when it doesn't actually change any class, which sounds like nonsense to me also.

Those problems is what this library is meant to address, maybe you don't need it.

npm install --save classattr

It works just like the classList API.

import ClassAttr from 'classattr';

const element = document.body;

ClassAttr.add ( element, 'foo', 'bar', 'baz' );

ClassAttr.contains ( element, 'foo' ); // => true
ClassAttr.contains ( element, 'foo2' ); // => false

ClassAttr.remove ( element, 'bar' );

ClassAttr.toggle ( element, 'baz' );
ClassAttr.toggle ( element, 'baz' );
ClassAttr.toggle ( element, 'baz', true );
ClassAttr.toggle ( element, 'baz', false );

MIT © Fabio Spampinato