jQuery.fn.closest equivalent in DOM js

gistfile1.js

// starting with current element, look up the DOM ancestor tree to see if anything matches the given selector

// returns element if found
// returns false if not found

function closest(elem, selector) {

   var matchesSelector = elem.matches || elem.webkitMatchesSelector || elem.mozMatchesSelector || elem.msMatchesSelector;

    while (elem) {
        if (matchesSelector.bind(elem)(selector)) {
            return elem;
        } else {
            elem = elem.parentNode;
        }
    }
    return false;
}

Nice snippet but use elem.parentElement not paretNode and you will get rid of the illegal invocation error.

Is it planned somewhere to add this as an Element method by some spec?