DemoTextfieldCounter.vue

<script setup>
const title = ref('Preliminary report')
const description = ref('California is a state in the western United States')
const rules = [v => v.length <= 25 || 'Max 25 characters']
</script>

<template>
  <VRow>
    <VCol cols="12">
      <VTextField
        v-model="title"
        :rules="rules"
        counter="25"
        placeholder="Placeholder Text"
        hint="This field uses counter prop"
        label="Regular"
      />
    </VCol>

    <VCol cols="12">
      <VTextField
        v-model="description"
        :rules="rules"
        counter
        maxlength="25"
        placeholder="Placeholder Text"
        hint="This field uses maxlength attribute"
        label="Limit exceeded"
      />
    </VCol>
  </VRow>
</template>