• Operating System: WSL

• Node Version: 12.2.0

• NPM Version: 6.9.0

• webpack Version: 4.30.0

• webpack-dev-server Version: 3.4.0

• This is a bug

• This is a modification request

Description

After upgrading my webpack-dev-server dependency to 3.4.0 from 3.2.1, the hot reload stopped working although there is no change in code. See gif below and steps to reproduce

Expected Behavior

Hot reload was working in 3.2.1

Actual Behavior

For Bugs; How can we reproduce the behavior?

My webpack.config.js is constructed dynamically and we run webpack through NodeJS API.
You can try the repo here:

https://github.com/facebook/Docusaurus/

Run install (we use yarn workspaces and monorepo)

yarn // install at root

Run the website

cd website
yarn start

Go to http://localhost:3000/docs/introduction
Edit file in website/docs/introduction.md and make changes. It should hot reload

Upgrade webpack-dev-server to 3.4.0 for packages/docusaurus/package.json and yarn again at project root.

Run the website again

cd website
yarn start

Notice that it is not able to hot reload now. It's always live reload

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