Continues to emit declaration files
Stops emitting declaration files if ANY modification is made to a .SCSS (sass) file, declaration directory structure is still there without any declarations.
If an edit is then made to a particular module it generates declarations for those files and it's imports but still missing from the the rest of the project.
Edit: This frequently happens when modifying TS files too, although in that case only some go missing (ones which don't have a direct dependency on the edited file).
yarn install
yarn start
Note how dist/types is generated
Now make a change to the .scss file and note all declaration files except for the directory structure are removed.
https://github.com/DominicTobias/ts-loader-declaration-bug
Edit: This appears to be caused when using clean-webpack-plugin in conjunction with ts-loader. So a quick fix is to stop using it.