composedpath.polyfill.js

// POLYFILLS
// Event.composedPath
// Possibly normalize to add window to Safari's chain, as it does not?
(function(E, d, w) {
  if(!E.composedPath) {
    E.composedPath = function() {
      if (this.path) {
        return this.path;
      } 
    var target = this.target;
    
    this.path = [];
    while (target.parentNode !== null) {
      this.path.push(target);
      target = target.parentNode;
    }
    this.path.push(d, w);
    return this.path;
    }
  }
})(Event.prototype, document, window);