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Class StringPredicate

Hierarchy

  • Predicate<string>
    • StringPredicate

Index

Accessors

alphabetical

  • get alphabetical(): this

alphanumeric

  • get alphanumeric(): this

date

  • get date(): this

empty

  • get empty(): this

lowercase

  • get lowercase(): this

nonEmpty

  • get nonEmpty(): this

not

  • get not(): this

numeric

  • get numeric(): this

uppercase

  • get uppercase(): this

url

  • get url(): this

Methods

Protected addValidator

endsWith

equals

includes

is

  • Test if the value matches a custom validation function. The validation function should return true if the value passes the function. If the function either returns false or a string, the function fails and the string will be used as error message.

    Parameters

    • validator: (value: string) => string | boolean

      Validation function.

        • (value: string): string | boolean
        • Parameters

          • value: string

          Returns string | boolean

    Returns StringPredicate

length

matches

maxLength

message

  • message(newMessage: string | ValidatorMessageBuilder<string>): StringPredicate
  • Provide a new error message to be thrown when the validation fails.

    example
    ow('🌈', 'unicorn', ow.string.equals('🦄').message('Expected unicorn, got rainbow'));
    //=> ArgumentError: Expected unicorn, got rainbow
    
    example
    ow('🌈', ow.string.minLength(5).message((value, label) => `Expected ${label}, to have a minimum length of 5, got \`${value}\``));
    //=> ArgumentError: Expected string, to be have a minimum length of 5, got `🌈`
    

    Parameters

    • newMessage: string | ValidatorMessageBuilder<string>

      Either a string containing the new message or a function returning the new message.

    Returns StringPredicate

minLength

oneOf

startsWith

validate

  • Test if the value matches a custom validation function. The validation function should return an object containing a validator and message. If the validator is false, the validation fails and the message will be used as error message. If the message is a function, the function is invoked with the label as argument to let you further customize the error message.

    Parameters

    • customValidator: CustomValidator<string>

      Custom validation function.

    Returns StringPredicate