vant/docs/site/mobile/main.js

import '../../../src/index.less';
import Vue from 'vue';
import VueRouter from 'vue-router';
import routes from '../router';
import App from './App';
import { importAll } from '../utils';
import '@vant/touch-emulator';

const componentMap = {};
const context = require.context('../../../src', true, /demo\/index.vue$/);

importAll(componentMap, context);

const router = new VueRouter({
  mode: 'hash',
  routes: routes({ mobile: true, componentMap }),
  scrollBehavior(to, from, savedPosition) {
    return savedPosition || { x: 0, y: 0 };
  }
});

router.afterEach(() => {
  if (!router.currentRoute.redirectedFrom) {
    Vue.nextTick(() => window.syncPath());
  }
});

window.vueRouter = router;

if (process.env.NODE_ENV !== 'production') {
  Vue.config.productionTip = false;
}

new Vue({
  el: '#app',
  render: h => h(App),
  router
});