Function triggerCallback

lib/test/angular/1.4.3/angular-animate.js:2008–2014

(event, element, phase, data)

    }

    function triggerCallback(event, element, phase, data) {
      $$rAF(function() {
        forEach(findCallbacks(element, event), function(callback) {
          callback(element, phase, data);
        });
      });
    }

    return {
      on: function(event, container, callback) {