前端工程化

const path = require(‘path‘)
const htmlWebpackPlugin = require(‘html-webpack-plugin‘)
const webpack = require(‘webpack‘)
const CopyWebpackPlugin = require(‘copy-webpack-plugin‘);
module.exports = {
  //模式/兼容性
  mode: ‘production‘,
  //入口
  entry: ‘./src/index.js‘,
  //出口
  output: {
    filename: ‘bundle.js‘,
    path: path.join(__dirname, ‘./dist‘)
  },
  //laoders
  module: {
    rules: [
      {
        //node-sass 的安装
        test: /\.(scss|sass)$/,
        use: [‘style-loader‘, ‘css-loader‘, ‘sass-loader‘]
      },
      {
        test: /\.js$/,
        loader: ‘babel-loader‘
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [‘file-loader‘]
      },
      {
        test: /\.(woff|woff2|eot|otf)$/,
        use: [‘file-loader‘]
      }
    ]
  },

  devServer: {
    hot: true,
    contentBase: ‘./dist‘,
    port: 8900
  },
  //plugins  new webpack.HotModuleReplacementPlugin 热模块更新
  plugins: [
    new htmlWebpackPlugin({
      filename: ‘index.html‘,
      template: ‘./index.html‘
    }),
    new webpack.HotModuleReplacementPlugin(),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: path.join(__dirname, ‘./src/assets‘),
          to: ‘assets‘
        }
      ]
    })
  ]
}

const {
  src, dest, series, watch
} = require(‘gulp‘)
const browserSync = require(‘browser-sync‘).create()
const reload = browserSync.reload
const plugins = require(‘gulp-load-plugins‘)()
const del = require(‘del‘)
function js (cb) {
  src(‘js/*.js‘)
    .pipe(plugins.uglify())
    .pipe(dest(‘./dist/js‘))
    .pipe(reload({
      stream: true
    }))

  cb()
}

function css (cb) {
  src(‘./scss/*.scss‘)
    .pipe(plugins.sass({ outputStyle: ‘compressed‘ }))
    .pipe(plugins.autoprefixer({
      cascade: false,
      remove: false
    }))
    .pipe(dest(‘./dist/css‘))
    .pipe(reload({
      stream: true
    }))
  console.log(‘this is css‘)
  cb()
}


function watcher () {
  watch(‘js/*.js‘, js)
  watch(‘scss/*.scss‘, css)
}

function clean (cb) {
  del(‘./dist‘)
  cb()
}

//server

function serve (cb) {
  browserSync.init({
    server: {
      baseDir: ‘./‘
    }
  })
  cb()
}

exports.scripts = js
exports.styles = css
exports.clean = clean
//npx gulp --tasks
exports.default = series([
  clean,
  js,
  css,
  serve,
  watcher
])