Node.js Production Build Using Webpack 4

Last updated on 25 Jan, 2023

Recently, one of my clients wants to generate node.js production build that includes node_modules so he doesn't need to run npm install on every server. Also he can distribute same build to his N number of customers servers. As this is deployed on multiple VM there is config.js file which will be going to read run time upon node server start. So I also need to consider that run time config as a part of bundle.

In this article I will show you how can you generate Node.js production build using webpack 4

When I started I found few articles but none of them has clear answer about how can I include config.js file as run time require file. 

Here is my most updated file for your reference.

const path = require('path');
const webpack = require('webpack');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const nodeExternals = require('webpack-node-externals');
const CopyWebpackPlugin = require('copy-webpack-plugin')

module.exports = {
entry: {
app: './src/index.js'
plugins: [
new CleanWebpackPlugin(['dist']),
new webpack.IgnorePlugin(/vertx/),
new CopyWebpackPlugin([
    { from: './src/config.js' }
output: {
filename: '[name].bundle.js',
path: path.resolve(__dirname, 'dist')
target: 'node',
externals: [nodeExternals()],
module: {
exprContextCritical: false

This config will basically generate bundle.js and will also copy config.js file into build directory using CopyWebpackPlugin. For config.js to be referred run time I have to make following changes in my code.

let config;

if(process.env.NODE_ENV === 'production'){
config = __non_webpack_require__("./config.js");
} else {
config = require('./config');

export default config;

__non_webpack_require__ will basically used to tell webpack to ignore that require to be transpile. Now whenever I run bundle.js it will include config.js from the current directory as module dependency. Bundle is so clean that client does not need to run npm install command everytime.

What's Next?

if you have similar requirement or new requirement then you can contact us at OR call us on +918866133870.

Hire Node.js Developers hire -button
about author

Hitesh Agja

I am Hitesh Agja, and I have 12+ years of industry experience. I am always excited and passionate about learning new things, technical or not. Life is all about learning new things and making the world more progressive.

Let's talkhire -button