Support TypeScript 4.8

Prerequisites

• I confirm my issue is not in the opened issues
• I confirm the Frequently Asked Questions didn’t contain the answer to my issue

Environment check

• I’m using the latest msw version
• I’m using Node.js version 14 or higher

Browsers

Chromium (Chrome, Brave, etc.), Firefox, Safari

Reproduction repository

N/A

Reproduction steps

N/A

Current behavior

When trying to update TypeScript to 4.8 (Just released today), we are warned that msw has a peerDependency range for typescript of >= 4.2.x <= 4.7.x. As such, it’s a pain to force update TypeScript. There’s no reason that msw should restrict the maximum TypeScript version we can use in our projects.

Expected behavior

It looks like this can be traced to msw features that require a minimum TS version (eg: #429).

Two solutions:

• Easy quick fix: Specify a minimum TS version in the peerDependencies but no maximum version
• Better long-term fix: Use the package.json typesVersions field to specify different type declaration files depending on the version of TS that someone is running. So if msw wants to use a new feature, they can create a new version of the types which is only used by users with compatible TS versions installed.

[CreativeTechGuy]

Thanks for this! At the very least I’ve learned a new perspective which is always valuable. Appreciate it!

[kettanaito]

Released: v0.46.0 🎉

This has been released in v0.46.0!

• 📄 Release notes
• 📦 npm package

Make sure to always update to the latest version (npm i msw@latest) to get the newest features and bug fixes.

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