foo.closest(bar) for Mootools

element.closest() for MooTools

Here's a sample implementation of the 'closest()' jQuery method, but for MooTools. It takes your first element and them iterates over its own parent until it finds the element you're looking for, returning it.

Code

Element.implement({
    closest: function(el) {
        var find = this.getElement(el),
            self = this;

        while (self && !find) {
            self = self.getParent();
            find = self ? self.getElement(el) : null;
        }

        return find;
    }
});

Usage

var myEl = document.getElement('.foo');
var findUl = myEl.closest('ul');