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memoized-node-fetch
A wrapper around node-fetch (or any other fetch-like function) that returns a single promise until it resolves.
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TLDR; I created a small npm package that acts as a wrapper around node-fetch, and returns the same promise for the same request, until it resolves. You can visit the repo of this package here. Below, I explain my motivation, and how I tackled the issue.
If you don't want to code this for yourself, I created a simple npm package that does all of the above, as a wrapper to node-fetch (or any other fetch-like function you choose).