Migrate to v4 of the Node.js model for Azure Functions - TypeScript version please!

[johnnyreilly]

I tried to upgrade my function app to v4 of the Node.js model using TypeScript. I attempted to guess my way into doing this, but without success. Experienced errors like this:

Conversion of type '{ status: number; body: string; desc: any; ')': any; }' to type 'HttpResponse' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
  Type '{ status: number; body: string; desc: any; ')': any; }' is missing the following properties from type 'HttpResponse': headers, cookies, enableContentNegotiation, bodyUsed, and 5 more.ts(2352)

resulting from this code:

        return {
          status: 200,
          body: 'hello world',
        } as HttpResponse;

Maybe I've cracked it

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Document Details

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• ID: f3f9f054-b375-b6db-b4f8-104df682bae0
• Version Independent ID: 78e7b869-81ec-7eac-49a6-40593f308f90
• Content: Migrate to v4 of the Node.js model for Azure Functions
• Content Source: articles/azure-functions/functions-node-upgrade-v4.md
• Service: azure-functions
• GitHub Login: @ggailey777
• Microsoft Alias: glenga

[Naveenommi-MSFT]

@johnnyreilly
Thank you for bringing this to our attention.
I've delegated this to content author @ggailey777, who will review it and offer their insightful opinions.

[johnnyreilly]

Thanks - I think I've worked out how to do it myself now. I may blog about it. It'd be great if the official docs covered it too!

[johnnyreilly]

Here's my blog post on how to upgrade with TypeScript: https://johnnyreilly.com/migrating-azure-functions-node-js-v4-typescript

[ejizba]

Hi @johnnyreilly I updated the docs to add a TypeScript pivot at the top of the article and made a few other tweaks based on your blog post (e.g. mentioning jsonBody). The changes might not show up in the docs until tomorrow, just fyi.

Thanks again for writing the blog post! I see a lot of value in these "real world" stories for both us and our users, especially compared to these official docs which are a bit more bland/generic

[johnnyreilly]

Happy to help! And thanks for making the official docs even better!