salix/front/core/components/scroll-up/scroll-up.js

import ngModule from '../../module';
import Component from '../../lib/component';
import './style.scss';

export default class Controller extends Component {
    constructor($element, $scope, $window) {
        super($element, $scope);
        this.$window = $window;

        $window.addEventListener('scroll', () => {
            if ($window.scrollY > 0)
                $element[0].style.display = 'block';
            else
                $element[0].style.display = 'none';
        });
    }

    goUp() {
        this.$window.scrollTo(0, 0);
    }
}

Controller.$inject = ['$element', '$scope', '$window'];

ngModule.vnComponent('vnScrollUp', {
    template: require('./scroll-up.html'),
    controller: Controller,
    bindings: {
        field: '=?',
        options: '<?',
        disabled: '<?',
        checked: '<?'
    }
});