# abstract new BaseValidator(async, message, acceptedTypes)

The BaseValidator class provides the foundation for all synchronous and asynchronous validator implementations. It handles type checking, error message formatting, and defines the interface that all validators must implement. This class is designed to be extended by specific validator classes that define their own validation logic.

Parameters:

View Source validation/Validators/BaseValidator.ts, line 5

Examples

// Example of a synchronous validator
class SyncValidator extends BaseValidator<SomeOptions, false> {
  constructor() {
    super(false, "Sync validation failed", String.name);
  }

  public hasErrors(value: any, options?: SomeOptions): string | undefined {
    if (typeof value !== "string") return this.getMessage(this.message);
    return undefined;
  }
}

// Example of an asynchronous custom validator
class AsyncValidator extends BaseValidator<SomeOptions, true> {
  constructor() {
    super(true, "Async validation failed", String.name);
  }

  public async hasErrors(value: any, options?: SomeOptions): Promise<string | undefined> {
    const result = await someAsyncCheck(value);
    if (!result) return this.getMessage(this.message);
    return undefined;
  }
}