vuelidate custom validation

To create a custom validation in Vue using vuelidate, you can follow these steps:

Import the necessary components: Start by importing the required components from vuelidate and Vue. You will need to import the required validator function from vuelidate, as well as Vue itself to create the custom validation.
Define the validation function: Next, define the custom validation function. This function will take a value as an input and return a boolean value indicating whether the validation passed or not. You can use this function to perform any custom logic or checks you need for the validation.
Add the validation function to the validation rules object: After defining the validation function, you need to add it to the validation rules object. This object contains all the validation rules for the form fields. You can specify the validation rule for a specific field by adding a property to the validation rules object with the same name as the field. The value of the property should be an object that contains the validation function.
Use the custom validation in the template: Finally, you can use the custom validation in the template by binding it to the input field using the v-model directive. You can also display any validation error messages using the v-if directive and the $v object provided by vuelidate.

That's it! You have now implemented a custom validation using vuelidate in Vue. Remember to import the necessary components, define the validation function, add it to the validation rules object, and use it in the template. This will allow you to perform custom validations for your form fields.