koa2-webpack-middleware

koa2 middleware with HMR(hot module replacement) supports

依赖

webpack-dev-middleware

webpack-hot-middleware

修改自

koa-webpack-middleware

Install

$ npm install koa2-webpack-middleware -D

Usage

import webpack from 'webpack'
import { devMiddleware, hotMiddleware } from 'koa-webpack-middleware'
import devConfig from './webpack.config.dev'
const compile = webpack(devConfig)
app.use(devMiddleware(compile, {
    // display no info to console (only warnings and errors)
    noInfo: false,

    // display nothing to the console
    quiet: false,

    // switch into lazy mode
    // that means no watching, but recompilation on every request
    lazy: true,

    // watch options (only lazy: false)
    watchOptions: {
        aggregateTimeout: 300,
        poll: true
    },

    // public path to bind the middleware to
    // use the same as in webpack
    publicPath: "/assets/",

    // custom headers
    headers: { "X-Custom-Header": "yes" },

    // options for formating the statistics
    stats: {
        colors: true
    }
}))

app.use(hotMiddleware(compile, {
  // log: console.log,
  // path: '/__webpack_hmr',
  // heartbeat: 10 * 1000
}))

HMR configure

1. webpack plugins configure

   plugins: [
       new webpack.HotModuleReplacementPlugin(),
       new webpack.NoErrorsPlugin()
   ]

2. webpack entry configure

   entry: {
     'index': [
       'webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000',
       'index.js']
   },

3. put the code in your entry file to enable HMR

   Pure JS need

   if (module.hot) {
     module.hot.accept()
   }

更多配置说明参考

webpack-dev-middleware

webpack-hot-middleware