$.live() like function in pure js

jquery-live.js

var live = (function () {
  var eventRegistry = {};

  function dispatchEvent(event) {
    var targetElement = event.target;

    eventRegistry[event.type].forEach(function (entry) {
      var potentialElements = document.querySelectorAll(entry.selector);
      var hasMatch = Array.prototype.indexOf.call(potentialElements, targetElement) >= 0;

      if (hasMatch) {
        entry.handler.call(targetElement, event);
      }
    });
  }

  return function (selector, event, handler) {
    if (!eventRegistry[event]) {
      eventRegistry[event] = [];
      document.documentElement.addEventListener(event, dispatchEvent, true);
    }

    eventRegistry[event].push({
      selector: selector,
      handler: handler
    });
  };
}());