salix/modules/item/front/summary/index.js

import ngModule from '../module';
import Summary from 'salix/components/summary';
import './style.scss';

class Controller extends Summary {
    getSummary() {
        this.$http.get(`Items/${this.item.id}/getSummary`).then(response => {
            this.summary = response.data;
        });
    }

    $onChanges() {
        if (this.item && this.item.id)
            this.getSummary();
    }
}

ngModule.vnComponent('vnItemSummary', {
    template: require('./index.html'),
    controller: Controller,
    bindings: {
        item: '<',
    },
});