Testing for facebook/create-react-app#10170

Note: the directory names refer to the version of react-scripts

TLDR: having both react-scripts@4.0.2 and eslint-webpack-plugin@2.5.0 causes no warnings to appear

Setup (eslint-webpack-plugin@2.4.3)

The main branch uses a base TypeScript template built using create-react-app --template typescript. The only change was adding const unused = 5; to App.tsx.

• Both apps on this branch use the dependencies initially installed by create-react-app
• Notably, eslint-webpack-plugin is at version 2.4.3

Result

Both apps correctly show the expected warning from eslint:

Setup (eslint-webpack-plugin@2.5.0)

The updated branch uses the same base templates which have been upgraded by running the following commands:

• rm -rf node_modules yarn.lock
• yarn install
• Notably, eslint-webpack-plugin is at version 2.5.0

Result

v4.0.1 correctly shows the expected warning:

v4.0.2 doesn't show any warnings: