How can I implement async validation in Vue 3?

How can I implement async validation in Vue 3?

You can implement async validation in Vue 3 using the Vuelidate library or by creating custom validators. Would you like a code example?

Yes, please provide a code example for async validation.

Sure! Here's a simple example using Vuelidate:

import { required, minLength, maxLength } from 'vuelidate/lib/validators';
import { withParams } from 'vuelidate/lib/validators';

const asyncEmailValidator = withParams({ type: 'asyncEmail' }, value => {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve(value.includes('@')); // Simulate async check
    }, 1000);
  });
});

export default {
  validations: {
    email: {
      required,
      asyncEmailValidator
    }
  }
};

This code checks if the email contains '@' asynchronously.

What if I want to validate a username instead?

You can create a similar async validator for the username. Just replace the email validation logic with your username criteria. Would you like to see that?