node-fetch - FormData not accepted as type for BodyInit

[tayloraucoin]

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• I tried using the @types/node-fetch package and had problems.
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  • Authors: @torstenwerner @nikcorg @vinaybedre

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Hey maintainers,

Seems like FormData should easily be accepted by BodyInit in @types/node-fetch. string works fine.

Missing something? Or a bug?

Not sure what the URLSearchParams is about. Looks like there is some related discussion on the topic: microsoft/TypeScript#30584

https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/node-fetch/index.d.ts

Thanks!

[nikcorg]

The FormData type that is part of the BodyInit union is imported from the form-data npm package. Perhaps this is an issue with the type definition of that package or the dependency needs to be upgraded. It seems to have gone up a whole major version since it was added as a dependency.

From what I can tell, the issue you're linking to is related to a browser environment, whereas node-fetch is a node library and I'm unsure how it is relevant.

Your screenshot doesn't reveal how you're constructing body, making it difficult to analyze the problem further. Are you sure this isn't a question that should be posted in the library's Github issues?

[eliellis]

Just had this problem. @tayloraucoin as per @nikcorg's comment, this can be resolved by simply adding import FormData from 'form-data' to your file's imports. The source of the error is from the fact the FormData type present in form-data and the FormData type present in Typescript's own browser type definitions don't have any overlap, giving you this type error.

[jimmywarting]

fyi, form-data is being discouraged in node-fetch@3
node-fetch/node-fetch#1212