How can I handle validation errors in Vue 3?

How can I handle validation errors in Vue 3?

In Vue 3, you can handle validation errors by using the built-in validators or libraries like Vuelidate or VeeValidate. You can define rules and display error messages based on the validation state.

Can you show me an example of using VeeValidate for form validation?

Sure! First, install VeeValidate. Then, you can create a form with validation rules like this:

import { defineRule, Form, Field, ErrorMessage } from 'vee-validate';

defineRule('required', value => !!value || 'This field is required.');

<Form @submit="handleSubmit">
  <Field name="username" rules="required" />
  <ErrorMessage name="username" />
  <button type="submit">Submit</button>
</Form>

What if I want to customize the error messages?

You can customize error messages by passing a message parameter in the rule definition. For example:

defineRule('required', value => !!value || 'Please enter your username.');

Are there any best practices for error handling in Vue 3?

Yes, some best practices include: using a centralized validation schema, providing user-friendly error messages, and ensuring that validation is triggered on user input.