vue全家桶安装以及修改webpack配置新增vue项目启动方式

一、安装node环境（自带npm）

下载地址

二、替换下载源

// 淘宝 NPM 镜像
npm install -g cnpm --registry=https://registry.npm.taobao.org      

三、全局安装vue-cli脚手架

npm install --global vue-cli      

四、vue2.* webpack模板下载

vue init webpack vue_project      

五、安装vuex

npm install vuex --save      

在main.js中注入vuex

// vuex
import Vuex from 'vuex'
Vue.use(Vuex)      

六、安装axios

npm install axios --save      

在main.js导入并全局使用

// axios请求
import axios from "axios"
Vue.prototype.$axios = axios      

七、安装elementUI

npm install element-ui --save      

在main.js中引入elementUI

// element样式框架
import ElementUI from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'      

Vue.use(ElementUI)      

八、vue项目使用sass

npm install sass-loader --save-dev
npm install node-sass --save-dev

//连写
npm install sass-loader node-sass --save-dev      

想要使用sass，需要修改build目录下的webpack.base.conf.js文件，增加以下规则：

{
  test: /\.sass$/,
  loaders: ['style', 'css', 'sass',"scss"]
}      

在组件中使用sass语法

<style lang="scss">

  $size:50px;
  html {
    font-size: $size;
  }

</style>      

或者外部引用：

<style lang="scss">

  @import "./main.scss"
  // 或者
  // @import url(./main.scss);

</style>      

 九、修改webpack配置，新增项目启动方式

以 pred 为例：

1，首先更改package.json配置

2，在build目录下增加pred.js,内容和build.js文件相同，更改以下两处变量即可

3.修改build目录下webpack.prod.conf.js配置，替换如下代码：

'use strict'
const path = require('path')
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

/** 删除内容
  const env = process.env.NODE_ENV === 'testing'
  ? require('../config/test.env')
  : require('../config/prod.env')
*/

// 替换成
  const ENV_MAP = {
    'testing': require('../config/test.env'),
    'production': require('../config/prod.env'),
    'pred': require('../config/pred.env')
  }
  const env = process.env.NODE_ENV = ENV_MAP[process.env.NODE_ENV];      

4.在config目录新增 pred.env.js文件，内容如下

'use strict'
module.exports = {
  NODE_ENV: '"pred"'
}      

5.修改config目录下的index.js，复制build对象并修改成pred

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
  },
  pred: {
    // 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
  }      

6，控制台输入 npm run pred，看到如下内容即成功：