Similar to jQuery's $.fn.closest and $.fn.parents.
Finds the closest parent that matches a selector.
$ npm install closest
closest(element, selector, checkSelf)element.
If falsey, will begin with element.parentNode and is synonymous to $.fn.parents.
Otherwise, it's $.fn.closest.Example:
var closest = require('cosest');
closest(document.body, 'html') === document.documentElement
closest(document.body, 'body', true) === document.body
closest(document.documentElement, 'html') == null
MIT