aurelia-pal-browser/src/custom-event.js

The browser-specific implementation of Aurelia's platform abstraction layer.

if (typeof FEATURE_NO_IE === 'undefined') {
  if (!window.CustomEvent || typeof window.CustomEvent !== 'function') {
    let CustomEvent = function(event, params) {
      params = params || {
        bubbles: false,
        cancelable: false,
        detail: undefined
      };

      let evt = document.createEvent('CustomEvent');
      evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
      return evt;
    };

    CustomEvent.prototype = window.Event.prototype;
    window.CustomEvent = CustomEvent;
  }
}