admin.js

var Vue = require('vue');

var validator = require('vue-validator');
Vue.use(validator);

// Change this when compiling for production
Vue.config.debug = true;
Vue.config.silent = false;

// Register some directives and filters

// Require some modules

// Require the billing module
require('./billing');

// Register a couple components

billing.js

var Vue = require('vue');
var Card = require('card');

module.exports = new Vue({
    el: '#billing',

    data: {
        // A bit of data
    }

    ready: function() {
        // This never runs
        console.log('hi');
    },

    methods: {
        // A few methods
    }
});