Webpack dev server - run multiple apps on multiple ports

Here is one way to do this. You can try using multiple compilers like this,

//webpack.config.js
[{
    entry: "./entry1.js",
    output: {
        filename: "outpu1.js"
    }
}, {
    entry: "./entry2.js",
    output: {
        filename: "outpu2.js"
    }
}]

then create a node script like this,

const WebpackDevServer = require("webpack-dev-server")
const webpack = require("webpack")
const config = require("./webpack.config")

const compiler = webpack(config)

const server1 = new WebpackDevServer(compiler.compilers[0], {
    contentBase: __dirname,
    hot: true,
    historyApiFallback: false,
    compress: true,
})

const server2 = new WebpackDevServer(compiler.compilers[1], {
    contentBase: __dirname,
    hot: true,
    historyApiFallback: false,
    compress: true,
})

server1.listen(3000, "localhost", function() {})
server2.listen(5000, "localhost", function() {})

You create a webpack-dev-server instance for each compiler.

Other way you can do this is to write multiple scripts in your package.json like this:

{
   "scripts":{
       "serve1": "webpack-dev-server --content-base <file/directory/url/port> --port 3000",
       "serve2": "webpack-dev-server --content-base <file/directory/url/port> --port 5000"
   }
}

and then run both scripts using npm-run-all,

npm-run-all serve1 serve2

Two node instance in package.json

"scripts": {
    "dev": "NODE_ENV=dev node ./node_modules/.bin/webpack-dev-server --watch --mode=development --config-name='survey' & NODE_ENV=dev node ./node_modules/.bin/webpack-dev-server --watch --mode=development --config-name='account'",
    "build": "node ./node_modules/.bin/rimraf ./dist && node ./node_modules/.bin/webpack-cli --mode=production"
  },

This is two different config. In every config have different dev config

const account = require("./account.config");
const survey = require("./survey.config");
module.exports = [account, survey];