dispose method
void
dispose()
Implementation
void dispose() {
this.domElement.removeEventListener( 'contextmenu', contextmenu, false );
this.domElement.removeEventListener( 'mousedown', onMouseDown, false );
this.domElement.removeEventListener( 'mousemove', onMouseMove, false );
this.domElement.removeEventListener( 'mouseup', onMouseUp, false );
this.domElement.removeEventListener( 'keydown', onKeyDown, false );
this.domElement.removeEventListener( 'keyup', onKeyUp, false );
}