webpack+vue2.0项目 (二)热加载,vue-router

目录创建好之后,命令行输入

npm run dev

因为在配置文件config/index.js里:

dev: {
    env: require('./dev.env'),
    port: 8080,
    autoOpenBrowser: true,
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {},
    // CSS Sourcemaps off by default because relative paths are "buggy"
    // with this option, according to the CSS-Loader README
    // (https://github.com/webpack/css-loader#sourcemaps)
    // In our experience, they generally work as expected,
    // just be aware of this issue when enabling this option.
    cssSourceMap: false
  }

webpack会默认创建本地服务器监听8080端口,autoOpenBrowser为true,浏览器会自动打开,我一般会关掉,因为以后调试会运行很多次 npm run dev;

然后打开

下面看下几个主要的文件:

index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>hello</title>
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>

index里面只有一个id为app的div,因为webpack会自动将js,css添加进去;

main.js

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'

Vue.config.productionTip = false

/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  template: '<App/>',
  components: { App }
})

这个文件,首先将vue,App(引入的component),router(配置路由);

创建Vue实例然后将App组件以<App><App/>的方式放入index里id为app的元素里;

然后是App.vue

<template>
  <div id="app">
    <img src="./assets/logo.png">
    <router-view></router-view>
  </div>
</template>

<script>
export default {
  name: 'app'
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

对vue组件不熟的可以去看官方文档,真的很详细;

在template中引入了 <router-view></router-view> 这代表路由,我们可以看下路由的配置;

router.js

import Vue from 'vue'
import Router from 'vue-router'
import Hello from '@/components/Hello'

Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/',
      name: 'Hello',
      component: Hello
    }
  ]
})

这个官方文档讲得也很清楚,path写的是路径,这个文件的意思是当路径是"/"(即当前页面)时,引入组件Hello.vue;

对应App.vue就是打开首页的同时要引入Hello.vue;

当然在真正的项目中会有多个路由,只要在routes中多加介个配置就行了;

下面是我在项目中的router.js文件,注:引入组件文件的时候,一定要注册组件

import Vue from 'vue'
import Router from 'vue-router'
import goods from '../components/goods/goods'
import seller from '../components/seller/seller'
import ratings from '../components/ratings/ratings'

Vue.use(Router)

export default new Router({
  linkActiveClass:'active',
  routes: [
    {
      path: '/goods',
      component: goods
    },
     {
      path: '/seller',
      component: seller
    },
     {
      path: '/ratings',
      component: ratings
    },
    {
      path: '/',
      component: goods
    },
  ]
})

linkActiveClasss:当路由切换到当页时会自动给顶层元素分配一个class属性,可以去自定义它,如下:

另外webpack最大的优点之一就是他的热加载:当你修改文件后(除配置文件),webpack会自动编译,并刷新页面

如果出现错误会在上面显示,如果正常会显示如下:

 

原文地址:https://www.cnblogs.com/yaokunlun/p/6586219.html