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Function: invalid()

invalid<E>(errors): Invalid<E>

Defined in: validation/constructors/index.ts:57

Creates an Invalid validation containing one or more errors.

Accepts either a single error or an array of errors for convenience. All errors are stored as an array internally for accumulation.

Type Parameters​

E​

E

Parameters​

errors​

The error(s) to wrap

E | readonly E[]

Returns​

Invalid<E>

An Invalid validation containing the errors

Example​

// Single error
invalid('Name is required')
// => { _tag: 'Invalid', errors: ['Name is required'] }

// Multiple errors
invalid(['Name is required', 'Email is invalid'])
// => { _tag: 'Invalid', errors: ['Name is required', 'Email is invalid'] }

// Real-world: Form validation
const validatePassword = (password: string) =>
  password.length < 8
    ? invalid(['Password too short', 'Must be at least 8 characters'])
    : valid(password)