> For the complete documentation index, see [llms.txt](https://docs.angular-package.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.angular-package.dev/error/validationerror/overview.md). # Overview ## `ValidationError {}` The `ValidationError` object is an extension of the [`CommonError`](/error/commonerror/overview.md) class and is thrown when an operation could not be performed despite proper type(but not exclusively) with the [message](/error/commonerror/accessors/get-message.md) built from the described problem and its solution, along with additional identification on the given or stored template. {% embed url="" %} `validation-error.class.ts` {% endembed %} ### Accessors | | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | |

public get name(): string
The get accessor obtains error name of a string type, set to 'ValidationError' that is being thrown.

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public get [Symbol.toStringTag](https://docs.angular-package.dev/error/validationerror): string
The get accessor, with the help of toStringTag, changes the default tag to 'ValidationError' for an instance of ValidationError.

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public static define(): ValidationError<Id>
Defines the ValidationError instance with the message built of the given required problem, fix and optional id on the supplied or stored template.

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public static isValidationError(): value is ValidationError<Id>
Checks whether the value of any type is the ValidationError instance of any or the given identification.

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