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[Solved] BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default

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Are You Facing the Following error BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default in Nodejs? Then You are in right place. In this article, we will try to figure out how this error occurs and what are the possible fixes for this error. First of all, let’s explore how this error occurs.

Contents
  1. What is BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default error?
  2. How To Fix BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default Error?
  3. Solution 1: add a fallback in the webpack.config.js
  4. Solution 2: Add node-polyfill-webpack-plugin in webpack.config.js
  5. Solution 3: Add Fallback path-browserify
  6. Conclusion

What is BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default error?

Trying to use webpack with nodejs but facing the following error.

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default. This is no longer the case. Verify if you need this module and configure a polyfill for it.

How To Fix BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default Error?

  1. How To Fix BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default Error?

    To Fix BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default Error You need to add support of node-polyfill-webpack-plugin in webpack.config.js Just like this: plugins: [ new NodePolyfillPlugin() ] And now, Your error will be solved. Thank you.

  2. BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default

    This error usually occurs when you update webpack to the latest version To Fix BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default Error You just need to add fallback in your webpack.config.js. First of all Open your webpack.config.js and add fallback. And now, You need to remove the node property from webpack.config.js And now, Your error will be solved. Thank you.

Solution 1: add a fallback in the webpack.config.js

This error usually occurs when you update webpack to the latest version To Fix BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default Error You just need to add fallback in your webpack.config.js. First of all Open your webpack.config.js and add fallback just like this.

resolve: {
  modules: [...],
  fallback: {
    "fs": false,
    "tls": false,
    "net": false,
    "path": false,
    "zlib": false,
    "http": false,
    "https": false,
    "stream": false,
    "crypto": false,
  } 
},

And now, You need to remove the node property from webpack.config.js

resolve: {
  // node: {
  //   fs: 'empty',
  //   net: 'empty',
  //   tls: 'empty'
  // },
}

And now, Your error will be solved. Thank you.

Solution 2: Add node-polyfill-webpack-plugin in webpack.config.js

You need to add support of node-polyfill-webpack-plugin in webpack.config.js Just like this.

const NodePolyfillPlugin = require("node-polyfill-webpack-plugin")

module.exports = {
    plugins: [
        new NodePolyfillPlugin()
    ]
}

And now, Your error will be solved. Thank you.

Solution 3: Add Fallback path-browserify

When you use the path package and that is not included in webpack by default so you need to install path-browserify by running this command.

npm install path-browserify --save-dev

OR

yarn add path-browserify --dev

And then add Fallback path-browserify Just like this.

{
  resolve: {
    fallback: {
      "path": require.resolve("path-browserify")
    }
  },
}

And now, Your error will be solved. Thank you.

Conclusion

It’s all About this error. I hope We Have solved Your error. Comment below Your thoughts and your queries. Also, Comment below on which solution worked for you.

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