element-ui/examples/entry.js

import Vue from 'vue';
import entry from './app';
import VueRouter from 'vue-router';
import configRouter from './route.config';
import Element from 'main/index.js';
import 'packages/theme-default/src/index.css';
import demoBlock from './components/demo-block.vue';
import MainFooter from './components/footer.vue';
import MainHeader from './components/header.vue';
import SideNav from './components/side-nav';
import FooterNav from './components/footer-nav';

Vue.use(Element);
Vue.use(VueRouter);
Vue.component('demo-block', demoBlock);
Vue.component('main-footer', MainFooter);
Vue.component('main-header', MainHeader);
Vue.component('side-nav', SideNav);
Vue.component('footer-nav', FooterNav);

const scrollBehavior = (to, from, savedPosition) => {
  if (savedPosition) {
    // savedPosition is only available for popstate navigations.
    return savedPosition;
  } else {
    // new navigation.
    // scroll to anchor
    if (to.hash) {
      return { anchor: true };
    }
    // explicitly control scroll position
    // check if any matched route config has meta that requires scrolling to top
    if (to.matched.some(m => m.meta.scrollToTop)) {
      return { x: 0, y: 0 };
    }
  }
};

const router = new VueRouter({
  mode: 'history',
  base: __dirname,
  scrollBehavior,
  routes: configRouter
});

new Vue({ // eslint-disable-line
  render: h => h(entry),
  router
}).$mount('#app');