|-config
|---dev.env.js
|---index.js
|---prod.env.js

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

'use strict'
//引入webpack-merge模块
const merge = require('webpack-merge')
//引入刚才打开的prod.env.js
const prodEnv = require('./prod.env')
module.exports = merge(prodEnv, {
  NODE_ENV: '"development"'
})

'use strict'
// Template version: 1.2.4
// see http://vuejs-templates.github.io/webpack for documentation.
const path = require('path')
module.exports = {
 dev: {
 // Paths
 assetsSubDirectory: 'static',
 assetsPublicPath: '/',
 proxyTable: {},
 // Various Dev Server settings
 host: 'localhost', // can be overwritten by process.env.HOST
 port: 8080, // can be overwritten by process.env.PORT, 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"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
 }
}