How can I implement async validation in Vuetify forms?

How can I implement async validation in Vuetify forms?

You can use the async prop in your validation rules. For example, you can create a method that checks the server for existing values.

Can you show me a code example?

Sure! Here's a simple example:

data() {
  return {
    email: '',
    emailRules: [
      v => !!v || 'Email is required',
      v => this.checkEmailAsync(v) || 'Email is already in use'
    ]
  }
},
methods: {
  async checkEmailAsync(email) {
    const response = await axios.get(`/api/check-email?email=${email}`);
    return response.data.available;
  }
}

What if I want to validate multiple fields asynchronously?

You can create separate async validation methods for each field and include them in their respective rules. Just ensure each method returns a boolean.