browser.js
function change(evt) {
    evt = evt || win.event;

    if ('readystatechange' === evt.type) {
      readystate.change(docReadyState());
      if (complete !== docReadyState()) return;
    }

    if ('load' === evt.type) readystate.change('complete');
    else readystate.change('interactive');

    //
    // House keeping, remove our assigned event listeners.
    //
    (evt.type === 'load' ? win : doc)[off](evt.type, change, false);
  }
function change(evt) {
    evt = evt || win.event;

    if ('readystatechange' === evt.type) {
      readystate.change(docReadyState());
      if (complete !== docReadyState()) return;
    }

    if ('load' === evt.type) readystate.change('complete');
    else readystate.change('interactive');

    //
    // House keeping, remove our assigned event listeners.
    //
    (evt.type === 'load' ? win : doc)[off](evt.type, change, false);
  }
function change ( evt ) { evt = evt || win . event ; if ( 'readystatechange' === evt . type ) { readystate . change ( docReadyState ( ) ) ; if ( complete !== docReadyState ( ) ) return ; } if ( 'load' === evt . type ) readystate . change ( 'complete' ) ; else readystate . change ( 'interactive' ) ; // // House keeping, remove our assigned event listeners. // ( evt . type === 'load' ? win : doc ) [ off ] ( evt . type , change , false ) ; }
Handle the various of event listener calls.

@param {Event} evt Simple DOM event.
@api private
Handle the various of event listener calls .