dist/collection/components/virtual-scroll/virtual-scroll.js
//dispatch listener of scroll on unload
dispatch listener of scroll on unload
dispatch listener of scroll on unload
unwatch() {
        if (this.parentScroll) {
            this.parentScroll.removeEventListener('scroll', this._listener);
        }
    }
unwatch ( ) { if ( this . parentScroll ) { this . parentScroll . removeEventListener ( 'scroll' , this . _listener ) ; } }
dispatch listener of scroll on unload
dispatch listener of scroll on unload