Side-effect component that when mounted sets class names on a given DOM element and removes them, when it is being unmounted.
import {ClassNames} from 'libreact/lib/ClassNames';
<ClassNames list={['some-class', 'another-class']} />list— required, array of string, list of class names to set.el— optional, DOM element on which to set the class names, defaults todocument.body.persist— optional, boolean, whether to keep the class names when component un-mounts, defaults tofalse.