Validation

Scalar validations

F.nonempty

Throws if the string is empty

const validate = F.nonempty(message)

Options

• message?: string - the error message in case of validation failure

Output

• (value: string) => asserts value is NonemptyText

F.lengthGreaterThan

Throws if the string length is less than or equal to the provided value

const validate = F.lengthGreaterThan(n, message)

Options

• n: N extends number - length to check
• message?: string - the error message in case of validation failure

Output

• (value: string) => asserts value is TextLengthGreaterThan<N>

F.required

Throws if the value is null

const validate = F.required(message)

Options

• message?: string - the error message in case of validation failure

Output

• (value: string) => asserts value is TextLengthGreaterThan<N>