Async Validation

The Validator library supports asynchronous validation rules through the onErrorAsync() method, enabling seamless handling of asynchronous validation checks within your validation workflows.

Example of Async Validation

Define async validation rules using the onErrorAsync() method:

v.validator<User>({
  id: 'userValidator',
  items: {
    email: v.string().required().email().onErrorAsync({
      error: async (value) => {
          return await checkEmailInUse(value); // call async function 'checkEmailInUse'
      },
      message: 'The email is already in use!'
    }),
  }
});

To execute async validation rules, use the following methods:

• validateAsync(data?) async version of validate()
• validateInfoAsync(data?) async version of validateInfo()
• validateThrowAsync(data?) async version of validateThrow()

By using async validation rules and these methods (validateAsync, validateInfoAsync, and validateThrowAsync), you can efficiently handle asynchronous validation scenarios in your application, ensuring robust data validation and error handling. Adjust the async validation logic according to your specific application requirements for optimal performance and functionality.