hotelHomestayWx/node_modules/uniapp-qrcode/demo/pages/index/index.js

//index.js
var wxbarcode = require('../../utils/index.js');

Page({

    data: {
        code: '1234567890123456789'
    },

    onLoad: function() {
        wxbarcode.barcode('barcode', '1234567890123456789', 680, 200);
        wxbarcode.qrcode('qrcode', '1234567890123456789', 420, 420);
    }
})