eiru_dashboard/static/src/js/widgets/customer_counter.js

function customer_counter (widget) {
    "use strict";

    widget.CustomerCounterWidget = widget.Base.extend({
        template: 'CustomerCounterTmpl',
        events: {
            'click a': 'showCustomers'
        },
        customers: [],
        fields: ['name'],
        domain: [['customer', '=', true], ['active', '=', true]],
        init: function (parent) {
            this._super(parent, { width: 3, height: 2 });
        },
        start: function () {
            var self = this;
            this.getCustomers().then(function (customers) {
                self.customers = customers;
                self.renderWidget();
            });
        },
        getCustomers: function () {
            var Customer = new instance.web.Model('res.partner');
            return Customer.query(this.fields).filter(this.domain).order_by(['id']).all();
        },
        renderWidget: function () {
            console.log(this.customers);
        },
        showCustomers: function (e) {
            this.do_action({
                type: 'ir.actions.act_window',
                res_model: "res.partner",
                views: [[false, 'list']],
                target: 'new',
                domain: [['customer', '=', true]],
                context: {},
            });
        }
    });
}