Class ErrorPredicate

Hierarchy

  • Predicate<Error>
    • ErrorPredicate

Accessors

evalError not rangeError referenceError syntaxError typeError uriError

Methods

addValidator hasKeys instanceOf is message messageIncludes name validate

Accessors

evalError

not

rangeError

referenceError

syntaxError

typeError

uriError

Methods

addValidator

  • addValidator(validator): this

  • Register a new validator.

    Parameters

    • validator: Validator<Error>

      Validator to register.

    Returns this

hasKeys

  • hasKeys(...keys): this

  • Test the error object to have specific keys.

    Parameters

    • Rest ...keys: readonly string[]

      One or more keys which should be part of the error object.

    Returns this

instanceOf

  • instanceOf(instance): this

  • Test an error to be of a specific instance type.

    Parameters

    • instance: Function

      The expected instance type of the error.

    Returns this

is

  • is(validator): this

  • 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 | boolean)

      Validation function.

        • (value): string | boolean

        • Parameters

          • value: Error

          Returns string | boolean

    Returns this

message

  • message(expected): this

  • Test an error to have a specific message.

    Parameters

    • expected: string

      Expected message of the Error.

    Returns this

messageIncludes

  • messageIncludes(message): this

  • Test the error message to include a specific message.

    Parameters

    • message: string

      Message that should be included in the error.

    Returns this

name

  • name(expected): this

  • Test an error to have a specific name.

    Parameters

    • expected: string

      Expected name of the Error.

    Returns this

validate

  • validate(customValidator): this

  • 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<Error>

      Custom validation function.

    Returns this

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