Tax number (VKN)

10-digit Turkish tax number, checked with the VKN algorithm.

← All examples·vkn

Built-in validation: VKN algorithm

The last digit is checked with the Turkish Revenue Administration's tax number algorithm; the error is vkn.invalid.

Preview

Form value: -

Display: -

import { useForm } from "react-hook-form"
import { useViraMask } from "@virastack/mask"
 
function Example() {
  const form = useForm<{ vkn: string }>()
  const { vkn } = useViraMask(form, { vkn: "vkn" })
 
  return <input {...vkn} placeholder="1234567890" />
}

Details

Pattern: 9999999999
Preset: "vkn"
Form value: "1234567890"
Error keys: vkn.incomplete, vkn.invalid

For the hook API see useViraMask(); for your own pattern see custom mask.