honojs-middleware/packages/conform-validator
Jonathan Haines b18f24379b
chore(dev-deps): upgrade to hono v4 (#1092)
* chore(dev-deps): upgrade to hono v4

* chore(zod-openapi): build workspace dependencies

* chore(trpc-server): ignore null body type
2025-03-31 18:20:57 +09:00
..
src test: move tests to src directory (#1075) 2025-03-28 18:50:19 +09:00
CHANGELOG.md Version Packages (#675) 2024-07-31 23:04:52 +09:00
README.md chore: add coverage badges (#1023) 2025-03-19 17:53:11 +09:00
package.json chore(dev-deps): upgrade to hono v4 (#1092) 2025-03-31 18:20:57 +09:00
tsconfig.cjs.json feat: Conform Validator Middleware (#666) 2024-07-31 22:55:02 +09:00
tsconfig.esm.json feat: Conform Validator Middleware (#666) 2024-07-31 22:55:02 +09:00
tsconfig.json build(conform-validator): lint published package (#1044) 2025-03-27 10:55:22 +09:00
vitest.config.ts test(workspace): upgrade to vitest v3 (#1009) 2025-03-12 12:52:15 +09:00

README.md

Conform validator middleware for Hono

codecov

The validator middleware using conform for Hono applications. This middleware allows you to validate submitted FormValue and making better use of Hono RPC.

Usage

Zod:

import { z } from 'zod'
import { parseWithZod } from '@conform-to/zod'
import { conformValidator } from '@hono/conform-validator'
import { HTTPException } from 'hono/http-exception'

const schema = z.object({
  name: z.string(),
  age: z.string(),
})

app.post(
  '/author',
  conformValidator((formData) => parseWithZod(formData, { schema })),
  (c) => {
    const submission = c.req.valid('form')
    const data = submission.value

    return c.json({ success: true, message: `${data.name} is ${data.age}` })
  }
)

Yup:

import { object, string } from 'yup'
import { parseWithYup } from '@conform-to/yup'
import { conformValidator } from '@hono/conform-validator'
import { HTTPException } from 'hono/http-exception'

const schema = object({
  name: string(),
  age: string(),
})

app.post(
  '/author',
  conformValidator((formData) => parseWithYup(formData, { schema })),
  (c) => {
    const submission = c.req.valid('form')
    const data = submission.value
    return c.json({ success: true, message: `${data.name} is ${data.age}` })
  }
)

Valibot:

import { object, string } from 'valibot'
import { parseWithValibot } from 'conform-to-valibot'
import { conformValidator } from '@hono/conform-validator'
import { HTTPException } from 'hono/http-exception'

const schema = object({
  name: string(),
  age: string(),
})

app.post(
  '/author',
  conformValidator((formData) => parseWithYup(formData, { schema })),
  (c) => {
    const submission = c.req.valid('form')
    const data = submission.value
    return c.json({ success: true, message: `${data.name} is ${data.age}` })
  }
)

Custom Hook Option

By default, conformValidator() returns a SubmissionResult when a validation error occurs. If you wish to change this behavior, or if you wish to perform common processing, you can modify the response by passing a function as the second argument.

app.post(
  '/author',
  conformValidator(
    (formData) => parseWithYup(formData, { schema })
    (submission, c) => {
      if(submission.status !== 'success') {
        return c.json({ success: false, message: 'Bad Request' }, 400)
      }
    }
  ),
  (c) => {
    const submission = c.req.valid('form')
    const data = submission.value
    return c.json({ success: true, message: `${data.name} is ${data.age}` })
  }
)

[!NOTE] if a response is returned by the Hook function, subsequent middleware or handler functions will not be executed. see more.

Author

uttk https://github.com/uttk

License

MIT