OTP Input for Vue

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One-time passcode Input. Accessible & unstyled. Based on the React version by guilhermerodz.

Installation

npm install vue-input-otp

Usage

<script setup lang="ts">
import { OTPInput } from 'vue-input-otp'
import Slot from './Slot.vue'

const input = ref('123456')
</script>

<template>
  <form>
    <OTPInput v-slot="{ slots }" v-model="input" :maxlength="6">
      <!-- slots -->
    </OTPInput>
  </form>
</template>

Default example

The example below uses tailwindcss, shadcn-vue, tailwind-merge and clsx:

<script setup lang="ts">
import { OTPInput } from 'vue-input-otp'
import Slot from './Slot.vue'
</script>

<template>
  <OTPInput
    v-slot="{ slots }"
    :maxlength="6"
    container-class="group flex items-center has-[:disabled]:opacity-30"
  >
    <div class="flex">
      <Slot v-for="(slot, idx) in slots.slice(0, 3)" v-bind="slot" :key="idx" />
    </div>

    <!-- Fake Dash. Inspired by Stripe's MFA input. -->
    <div class="flex w-10 justify-center items-center">
      <div class="w-3 h-1 rounded-full bg-border" />
    </div>

    <div class="flex">
      <Slot v-for="(slot, idx) in slots.slice(3)" v-bind="slot" :key="idx" />
    </div>
  </OTPInput>
</template>

<script setup lang="ts">
import type { SlotProps } from 'vue-input-otp'
import { cn } from '$lib/utils'

defineProps<SlotProps>()
</script>

<template>
  <div
    :class="cn(
      'relative w-10 h-14 text-[2rem]',
      'flex items-center justify-center',
      'transition-all duration-300',
      'border-border border-y border-r first:border-l first:rounded-l-md last:rounded-r-md',
      'group-hover:border-accent-foreground/20 group-focus-within:border-accent-foreground/20',
      'outline outline-0 outline-accent-foreground/20',
      { 'outline-4 outline-accent-foreground': isActive },
    )"
  >
    <div v-if="char !== null">
      {{ char }}
    </div>

    <!-- Emulate a Fake Caret -->
    <div v-if="char === null && isActive" class="absolute pointer-events-none inset-0 flex items-center justify-center animate-caret-blink">
      <div class="w-px h-8 bg-white" />
    </div>
  </div>
</template>

// tailwind.config.ts for the blinking caret animation.
// Small utility to merge class names.
import { clsx } from 'clsx'
import { twMerge } from 'tailwind-merge'

import type { ClassValue } from 'clsx'

const config = {
  theme: {
    extend: {
      keyframes: {
        'caret-blink': {
          '0%,70%,100%': { opacity: '1' },
          '20%,50%': { opacity: '0' },
        },
      },
      animation: {
        'caret-blink': 'caret-blink 1.2s ease-out infinite',
      },
    },
  },
}

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs))
}

How it works

There's currently no native OTP/2FA/MFA input in HTML, which means people are either going with 1. a simple input design or 2. custom designs like this one. This library works by rendering an invisible input as a sibling of the slots, contained by a relatively positioned parent (the container root called OTPInput).

API Reference

OTPInput

The root container. Define settings for the input via props. Then, pass in child elements to create the slots.

Props

Name	Description	Type	Values	Default
maxlength	The number of slots.	number	-	-
containerClass	The class for the root container.	string	-	-
textAlign	Where is the text located within the input. Affects click-holding or long-press behavior.	string	left, right, center	center
inputmode	Virtual keyboard appearance on mobile.	string	numeric, text	numeric
pushPasswordManagerStrategy	Detect Password Managers and shift their badges to the right side, outside the input.	string	increase-width, none	increase-width

Slots

Name	Description	Props
default	The slots to be rendered.	slots: SlotProps[], isFocused: boolean, isHovering: boolean

Events

Name	Description	Parameters
complete	Emitted when the input is complete.	value: string

Examples

Automatic form submission on OTP completion

<script setup>
import { OTPInput } from 'vue-input-otp'
import { ref } from 'vue'

const formRef = ref()
const buttonRef = ref()

function onComplete() {
  // ... automatically submit the form
  formRef.value.submit()
  // ... or focus the button like as you wish
  buttonRef.value.focus()
}
</script>

<template>
  <form ref="formRef">
    <OTPInput @complete="onComplete" />
    <button ref="buttonRef">
      Submit
    </button>
  </form>
</template>

Automatically focus the input when the page loads

<script setup>
import { OTPInput } from 'vue-input-otp'
</script>

<template>
  <form>
    <!-- Pro tip: accepts all common HTML input props... -->
    <OTPInput auto-focus />
  </form>
</template>

Caveats

See list of caveats in the original implementation here.

License

MIT