vuejs_01项目启动

知识点

1.npm 相关命令

npm list -g --depth=0  查看全局安装了哪些依赖

项目启动

npm install vue-cli -g                安装vue脚手架    

vue init webpack foldername        用webpack构建项目

//npm init -y                         生成package.json文件

npm i                                 下载项目依赖（是根据package.json来安装）

npm start                             下载完依赖后 运行项目

选择 git 进行版本控制 

 

项目目录

build   构建脚本
config  配置文件
src      写前端vue项目
   —main.js 整个前端项目的入口，引vue
   —app.vue 根组件

    
static   静态资源

src->router->index.js 路由路径设置不区分大小写

path: '/GoodsList',//路径这里不区分大小写

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import GoodsList from '@/views/GoodsList'
import Cart from '@/views/Cart'

Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/',
      name: 'HelloWorld',
      component: HelloWorld
    },
    {
      path: '/GoodsList',//路径这里不区分大小写
      name: 'GoodsList',
      component: GoodsList
    },
    {
      path: '/Cart',
      name: 'Cart',
      component: Cart
    },
  ]
})

根组件app.vue

vue模板里面只能有一个顶层div

<template>
  <div id="app">
    <!-- <img src="./assets/logo.png"> logo图标-->
    <!-- router-view 写的是所有的组件在main.js引入，所有的页面由router-view进行控制 -->
    <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>

config->index.js 文件夹默认路径配置

'use strict'
// Template version: 1.2.1
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path')

module.exports = {
  dev: {

    // Paths
    assetsSubDirectory: 'static', 
    //默认静态资源目录，调用的时候直接用/static/img/1.jpg

    assetsPublicPath: '/',
　　
    proxyTable: {},

    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 8080, // can be overwritten by process.env.HOST, if port is in use, a free one will be determined
    autoOpenBrowser: false,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-

    // Use Eslint Loader?
    // If true, your code will be linted during bundling and
    // linting errors and warnings will be shown in the console.
    useEslint: true,
    // If true, eslint errors and warnings will also be shown in the error overlay
    // in the browser.
    showEslintErrorsInOverlay: false,

    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'eval-source-map',

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true,

    // 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,
  },
  
  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',

    /**
     * Source Maps
     */

    productionSourceMap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',
    
    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    
    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  }
}

开发过程中的技巧：

1.页面报错信息：找Error关键字

Failed to compile.

./node_modules/vue-loader/lib/template-compiler?{"id":"data-v-21894420","hasScoped":true,"transformToRequire":{"video":"src","source":"src","img":"src","image":"xlink:href"},"buble":{"transforms":{}}}!./node_modules/vue-loader/lib/selector.js?type=template&index=0&bustCache!./src/views/GoodsList.vue
Module not found: Error: Can't resolve './../img/1.jpg' in 'F:24.es6+node.jsl练习vuejs实战练习-动脑20171030vue2-shop-lessonsrcviews'
 @ ./node_modules/vue-loader/lib/template-compiler?{"id":"data-v-21894420","hasScoped":true,"transformToRequire":{"video":"src","source":"src","img":"src","image":"xlink:href"},"buble":{"transforms":{}}}!./node_modules/vue-loader/lib/selector.js?type=template&index=0&bustCache!./src/views/GoodsList.vue 238:34-59
 @ ./src/views/GoodsList.vue
 @ ./src/router/index.js
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./src/main.js