I've been exploring the use of Neverthrow to manage errors within the type system in TypeScript. The idea is to return a `Promise<Result>` instead of just `Promise`, which encourages explicit handling of both successful and failed outcomes. This approach seems more organized compared to the traditional method of using try-catch blocks scattered throughout the code. Here's a quick example:
```typescript
import { ok, err, Result } from 'neverthrow'
function parseJson(input: string): Result {
try {
return ok(JSON.parse(input))
} catch (e) {
return err(new Error('Invalid JSON'))
}
}
const result = parseJson('{ bad json }')
result.match({
ok: (data) => console.log('Parsed:', data),
err: (e) => console.error('Error:', e),
})
```
I appreciate the clarity this model brings, especially for handling async operations and API responses. However, I'm wondering if this added complexity is worth it in frontend applications. Have you tried Neverthrow or something similar? Or do you feel that a simple try-catch is sufficient for error handling?
4 Answers
I've tried using Neverthrow and while it does look cleaner, I found that the overhead can be a bit much. In Vue.js, it feels cumbersome due to the way TypeScript and JavaScript handle async operations. In many cases, I've gone back to just using traditional try-catch blocks.
I've dabbled in this approach! I think what you're getting at is pretty valid. In languages like Haskell, this pattern shines, but in TypeScript, you might find it clunky. I've noticed some performance overhead when using libraries like Neverthrow due to extra object allocations, though the readability might improve your development experience.
I haven't used Neverthrow specifically, but I implemented a similar pattern in a project. It has improved the consistency and readability of error handling. Instead of throwing exceptions, I return a specific result object indicating whether the operation succeeded or if there was an error, making it easier to manage errors without cluttering the code with try-catch blocks.
To be honest, it all depends on your project requirements. If you're looking for cleaner error management, Neverthrow or equivalent can help. Personally, I just work with standard `Promise` and return custom error objects. It keeps things straightforward.
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