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FastAPI
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presupplied reviews and mentions
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Show HN: Build type-safe web APIs with JavaScript, instantly
We tried for years to do things like this, and in the end an approach using typescript is way, way better than anything else I've seen attempted.
In my latest project[1], we set up the types for the API. The server and client are both bound by those types, meaning that one cannot change without the other. This fixes an entire class of bugs where backend code gets updated without the corresponding front-end code changing or vice-versa. It also has the nice side-effect that all of the possible return values (including errors) are nicely documented in one file, and that the errors are very consistent. On the frontend we have a "typed fetch" which returns typed results from the API.
We are also using this for typed access to localStorage, another source of many bugs in past projects, where random keys end up being scattered and causing nondeterministic behavior on different devices.
You can see how our API type system is implemented here:
common types for both client and server: https://github.com/stoarca/presupplied/blob/master/images/ps...
client's typed fetch: https://github.com/stoarca/presupplied/blob/master/images/ps...
server's typed endpoint definitions: https://github.com/stoarca/presupplied/blob/master/images/ps...
[1]: We are working on https://app.presupplied.com, a digital home-schooling curriculum to teach 3-year-olds to read. Planning to expand to math, writing, and programming.
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stoarca/presupplied is an open source project licensed under MIT License which is an OSI approved license.
The primary programming language of presupplied is TypeScript.
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