Error Handling for fetch in TypeScript

1. zod

   1 387 39,757 9.8 TypeScript

   TypeScript-first schema validation with static type inference

   

   …but that’s a lot of no fun, dangerous work. Better to use a library that has already solved this problem like Zod or ArkType. It’ll ensure the types match up, and if not, give you an error response that _somewhat_ gives you a clue as to why the decoding went wrong, way more thorough and verbose than JSON.parse’s not so great runtime error messages.

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3. RxJS

   2 113 31,433 2.7 TypeScript

   A reactive programming library for JavaScript

   

   – Promise – native to all browsers, Node.js, and handles synchronous and asynchronous code; Errors are unknown – Observable – typically used in Angular, but supported everywhere you import the RxJS library, and handles synchronous and asynchronous code; Errors are typically typed Observable – Result or Either – a TypeScript discriminated union; handles synchronous, Errors are typically just strings

4. effect

   3 49 11,110 9.9 TypeScript

   Build production-ready applications in TypeScript

   

   The less uncommon are typed FP libraries like Effect or true-myth.

5. arktype

   4 58 6,510 9.2 TypeScript

   TypeScript's 1:1 validator, optimized from editor to runtime

   

   …but that’s a lot of no fun, dangerous work. Better to use a library that has already solved this problem like Zod or ArkType. It’ll ensure the types match up, and if not, give you an error response that _somewhat_ gives you a clue as to why the decoding went wrong, way more thorough and verbose than JSON.parse’s not so great runtime error messages.

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