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io-ts-reporters
Advanced tools
Error reporters for io-ts.
Currently this package only includes one reporter. The output is an array of strings in the format of:
Expecting ${expectedType} at ${path} but instead got: ${actualValue}
And for union types:
Expecting one of:
${unionType1}
${unionType2}
${...}
${unionTypeN}
at ${path} but instead got: ${actualValue}
yarn add io-ts-reporters
import * as t from 'io-ts'
import reporter from 'io-ts-reporters'
const User = t.interface({name: t.string})
// When decoding fails, the errors are reported
reporter.report(User.decode({nam: 'Jane'}))
//=> ['Expecting string at name but instead got: undefined']
// Nothing gets reported on success
reporter.report(User.decode({name: 'Jane'}))
//=> []
To only format the validation errors in case the validation failed (ie.
mapLeft
) use formatValidationErrors
instead.
import * as t from 'io-ts'
import {formatValidationErrors} from 'io-ts-reporters'
import * as E from 'fp-ts/Either'
import {pipe} from 'fp-ts/pipeable'
const User = t.interface({name: t.string})
const result = User.decode({nam: 'Jane'}) // Either<t.Errors, User>
E.mapLeft(formatValidationErrors)(result) // Either<string[], User>
For more examples see the tests.
io-ts-reporters version | required typescript version |
---|---|
1.0.0 | 3.5+ |
<= 0.0.21 | 2.7+ |
yarn
yarn run test
This library was created by OliverJAsh.
FAQs
Formatting of io-ts validation errors
We found that io-ts-reporters demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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