[Question]: Is there a way to add validation messages with custom validators?

Adding I18n messages with existing validators is possible but can it be done with a custom validator?

const sizeValidator = (size: number = 15) => (value: string) => {
	return !helpers.req(value) || value.length === size
}
export const size = withI18nMessage(sizeValidator)

Something like the above.

[crotanite]

It did not, I did manage to get it working with something like the below though. (for future reference for anyone)

// size.ts
import { helpers } from '@vuelidate/validators'

export default function(amount: number) {
	return {
		$validator: function(value: string) {
			return !helpers.req(value) || value.length === amount
		},
		$message: ({ $params }) => `This field should be exactly ${$params.amount} long.`,
		$params: { amount, type: 'size' }
	}
}

// validators.ts
import { createI18nMessage } from '@vuelidate/validators'
import { createI18n } from 'vue-i18n'
import sizeValidator from './size'

const i18n = createI18n({
	locale: 'en',
	messages: {
		en: {
			validations: {
				size: 'The {property} field must be {amount} characters long.'
			}
		}
	}
})
const t = i18n.global.t
const withI18nMessage = createI18nMessage({ t })

export const size = withI18nMessage(sizeValidator, { withArguments: true })

[dobromir-hristov]

You probably dont need to specify $message if you are applying i18n messages. But yeah, glad you sorted it out. Docs could deff be improved in this regard.