vue启动组件写法

webpack配置文件（webpack.base.conf.js）：

module.exports = {
  entry: {
    app: './src/main.js'
  },
  ......
}

App.vue

<template>
    <div id="app">
        <router-view></router-view>
    </div>
</template>

<script>
    export default {
        name: 'app',
        components: {
        }
    }

</script>

main.js

import babelpolyfill from 'babel-polyfill'
import Vue from 'vue'
import App from './App'
import ElementUI from 'element-ui'
import 'element-ui/lib/theme-default/index.css'
import VueRouter from 'vue-router'
import store from './vuex/store'
import Vuex from 'vuex'
import NProgress from 'nprogress'
import 'nprogress/nprogress.css'
import routes from './routes'
import Mock from './mock'
//Mock.bootstrap(); //会影响http请求
import 'font-awesome/css/font-awesome.min.css'

Vue.use(ElementUI)
Vue.use(VueRouter)
Vue.use(Vuex)

NProgress.configure({ showSpinner: false });

const router = new VueRouter({
  routes
})

/*
router.beforeEach((to, from, next) => {
  //NProgress.start();
  if (to.path == '/login') {
    sessionStorage.removeItem('user');
  }
  let user = JSON.parse(sessionStorage.getItem('user'));
  if (!user && to.path != '/login') {
    next({ path: '/login' })
  } else {
    next()
  }
})
*/
//router.afterEach(transition => {
//NProgress.done();
//});

new Vue({
  //el: '#app',
  //template: '<App/>',
  router,
  store,
  //components: { App }
  render: h => h(App)
}).$mount('#app')

 $mount()手动挂载

当Vue实例没有el属性时，则该实例尚没有挂载到某个dom中；
假如需要延迟挂载，可以在之后手动调用vm.$mount()方法来挂载。例如：
<div id="app">
{{a}}
</div>
<button onclick="test()">挂载</button>
<script>
var obj = {a: 1}
var vm = new Vue({
data: obj
})
function test() {
vm.$mount("#app");
}
初始，显示的是{{a}}
当点击按钮后，变成了1
参考http://blog.csdn.net/qq20004604/article/details/52303754