Msw/2/Upgrade Recipe

This recipe is a set of codemods that will upgrade your project from using msw v1 to v2.

The recipe includes the following codemods:

• imports
• type-args
• request-changes
• ctx-fetch
• req-passthrough
• response-usages
• callback-signature
• lifecycle-events-signature
• print-handler

FNs

This recipe does not change the signatures of MSW handlers, if they were called using a custom factory function, for example to provide more type-safety or else. For example, the following code will only be partially updated:

export function mockFactory<T extends MyComplexType>(
 url: string,
 resolver: MyResolverType,
) {
 return rest.get(url, resolver);
}

const handlers = [
 mockFactory('/some/url', (req, res, ctx) => {
  return res(ctx.status(200));
 }),
];

Also, if you were using req.body in your interceptors, this codemod will blindly assume you want await request.json() instead of any other type. You will have to correct that manually.