This is a quick example of how to implement a required checkbox field in Vue 3 with VeeValidate.

Vue 3 + VeeValidate Required Checkbox App Component

The app component template contains a form with a single required checkbox fields and a validation message. The form and checkbox field are built with the VeeValidate <Form /> and <Field /> components which automatically hook into the validation rules (schema) based on the name of the field.

The form calls the onSubmit() method when the form is submitted and valid. Validation rules are bound to the form with the validation-schema prop, and validation errors are provided to the form template via the scoped slot v-slot="{ errors }".

The app component code defines the required checkbox validation rule with the Yup schema validation library which VeeValidate supports out of the box, the checkbox is set to required with the rule Yup.bool().required() and setting the value of the checkbox input to true (:value="true"), for more info on Yup see https://github.com/jquense/yup.

The onSubmit() method is called when the form is valid and submitted, and simply displays the contents of the form in a javascript alert.

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