Vue.js limit characters length

gistfile1.txt

<template>
  <input type="text" :value="value" @input="updateValue" />
  {{value}}
</template>

<script>
import { ref } from "vue";

export default {
  name: "App",
  setup() {
    const value = ref('12')

    const updateValue = e => {
      const val = e.target.value
      value.value = val.slice(0, 2)
      e.target.value = value.value
    }

    return {
      value,
      updateValue
    }
  }
};
</script>