How can I implement async validation in Vue 3 forms?

How can I implement async validation in Vue 3 forms?

You can use the vuelidate library or Vue's built-in validation features. Would you like a code example?

Yes, please provide a code example for async validation.

Here's a simple example using vuelidate:

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

export default {
  validations: {
    username: { required, minLength: minLength(3) },
  },
  async validateUsername(value) {
    const isTaken = await checkUsernameAvailability(value);
    return !isTaken;
  }
};

What is the checkUsernameAvailability function supposed to do?

The checkUsernameAvailability function should make an API call to check if the username is already taken. You can implement it using fetch or axios.