Uncaught TypeError: Cannot assign to read only property 'exports' of object '#<Object>'

Uncaught TypeError: Cannot assign to read only property ‘exports’ of object'#<Object>'

webpack:///node_modules/webpack-dev-server/client/clients/BaseClient.js?e917

• Operating System: macOS 10.14.6
• Node Version: 12. v12.18.0
• NPM Version: 6.14.4
• webpack Version: 4.12.0
• webpack-dev-server Version: 3.1.4
• Browser: Chrome Version 85.0.4164.0 (Official Build) canary (64-bit)

This is a bug

Code

https://github.com/littlematch0123/blog-client/blob/master/build/webpack.dev.conf.js

// webpack.config.js

// additional code, remove if not needed.

Expected Behavior

no error

Actual Behavior

crashed

For Bugs; How can we reproduce the behavior?

$ git clone https://github.com/littlematch0123/blog-client

$ yarn

$ npm run dev

# open http://localhost:8888/

For Features; What is the motivation and/or use-case for the feature?

[Almansad]

The same thing happened to me when trying to update a project generated with old vue-cli from Webpack 3 to 4. In the build/webpack.base.conf.js file you have to remove the include in the loader from babel to webpack-dev-server

Berfore

    {
       test: /\.js$/,
       loader: 'babel-loader',
       include: [
         resolve('src'),
         resolve('test'),
         resolve('node_modules/webpack-dev-server/client') <--- delete disline
       ]
     }

After

      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: [
          resolve('src'),
          resolve('test')
        ]
      }

and update webpack-dev-server to 3.11.0 in package.json

[alexander-akait]

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Answer above