Hello world!!
I'm searching about validator in js and ts. So, I'm gonna write about my summary and conclution.!!
Comparing
| Package | Feature | Merit | Demerit | Link |
|---|---|---|---|---|
| Zod | TypeScript-first schema validation with static type inference | Method chaining and easy to get ts type | Newer package | zod.dev |
| joi | This is almost same to zod | Have many plugins | Doesn't support static type inference | https://github.com/sideway/joi |
| Yup | This is almost same to zod | Have many plugins | Missing some feature, function, deep object, promise... ... | https://github.com/jquense/yup |
| class-validator | Validate class properties | Have many features | Code isn't clean | https://github.com/typestack/class-validator |
| ajv | Validate by json scheme | Enable to share schem to other languages | Not supported typescript | https://ajv.js.org/ |
Recommandation
If you don't validate by class
I recommand you zod.
If you want to use decorator for validation
I don't recommand you class-validator, instead of it, I recommand you some plugins.
For example, joiful. This is joi plugin.
zod
// In typescript
import { z } from 'zod'
const userScheme = z.object({
username: z.string(),
email: z.string().email()
})
type User = z.infer<typeof userScheme>
const data: User = {
username: 'Takashi',
email: 'not email'
}
// This code will throw validation error!!
const validated = userScheme.parse(data)
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