Support TypeScript 4.1

TypeScript 4.1 adds an option to use path mapping without specifying baseUrl, more about it in TypeScript 4.1 Release Notes

My project is using TypeScript 4.1.2, trying to remove the baseUrl I get the following error

Failed to load tsconfig.json: Missing baseUrl in compilerOptions tsconfig-paths-webpack-plugin: Found no baseUrl in tsconfig.json, not applying tsconfig-paths-webpack-plugin

Would like to submit a PR with a little help 😃

[jakebailey]

Sure, the function I wrote to generate aliases is here: https://github.com/microsoft/pyright/blob/169c6089b9914870c43622743c75844657cd9d70/build/lib/webpack.js#L90

resolve.alias gets set to the return value of this function.

As far as I can tell, this is all you need to support tsconfig paths. It verifies enough to make the file ts-check (hence the asserts), but otherwise is all that’s really needed to make paths work, no plugin needed.

[jakebailey]

I have no idea what storybook is, but I don’t see why not. Can’t hurt to try.