Finds the first parent of an element that satisfies an iterator.

find-parent.amd.js

define(function(){

  return function(el, iterator){
    var cur = el;
    while(cur.parentNode !== document.body){
      if(iterator.call(null, cur)){
        return cur
      }else{
        cur = cur.parentNode;
      }
    }
    return null;
  };

});