# How to Handle the Hidden Autocomplete Field for Password Inputs in vue3-otp-input

> Learn how to manage the hidden autocomplete field for password inputs in vue3-otp-input. Discover the solution to prevent unintended browser autofills and ensure secure OTP entry.

- Repository: [Ejiro Asiuwhu/vue3-otp-input](https://github.com/ejirocodes/vue3-otp-input)
- Tags: how-to-guide
- Published: 2026-03-01

---

**The vue3-otp-input component automatically injects an invisible text input with `autocomplete="off"` before the visible OTP fields when `input-type="password"` is set, tricking browsers into autofilling the hidden field instead of the password inputs.**

When building secure OTP or PIN entry flows with the vue3-otp-input library, enabling password mode via `input-type="password"` triggers browser password managers to attempt autofill, disrupting the user experience. The component solves this by rendering a hidden autocomplete field that intercepts these browser behaviors while keeping your OTP inputs clean.

## Why Browsers Autofill Password OTP Fields

Modern browsers aggressively detect `type="password"` inputs and prompt users to save or autofill credentials. When vue3-otp-input renders six individual password boxes for a six-digit OTP, the browser treats each as a credential field, causing unwanted password manager popups and automatic filling of saved passwords into your PIN entry interface.

## How vue3-otp-input Blocks Autocomplete

The component implements a defensive rendering strategy that places a decoy input field before the actual OTP inputs.

### The Hidden Input Technique

When `inputType` equals `"password"`, vue3-otp-input renders an invisible text input with specific attributes designed to capture browser autofill attempts:

```html
<input
  autocomplete="off"
  name="hidden"
  type="text"
  style="display: none"
/>

```

This element appears in the DOM immediately before the visible OTP input fields. Because it carries `name="hidden"` and `autocomplete="off"`, browsers identify it as the primary password field while ignoring the visible OTP boxes for autofill purposes.

### Conditional Rendering Logic

The hidden field only appears when necessary. In [`src/components/vue3-otp-input.vue`](https://github.com/ejirocodes/vue3-otp-input/blob/main/src/components/vue3-otp-input.vue) at lines 221-227, a `v-if` directive guards the hidden input:

```vue
<input
  v-if="inputType === 'password'"
  autocomplete="off"
  name="hidden"
  type="text"
  style="display: none"
/>

```

This ensures that standard OTP inputs (using `input-type="tel"` or `"number"`) remain unaffected by the hidden field logic, maintaining clean DOM structure for non-password use cases.

## Implementation Details in the Source Code

The autocomplete prevention mechanism lives in the main component file at [`src/components/vue3-otp-input.vue`](https://github.com/ejirocodes/vue3-otp-input/blob/main/src/components/vue3-otp-input.vue). The specific implementation spans lines 221-227, where the template conditionally renders the decoy input.

The architecture follows this pattern:

| Concern | Implementation |
|---------|---------------|
| **Password autofill prevention** | Hidden `<input>` with `autocomplete="off"` placed before visible OTP fields |
| **Conditional activation** | `v-if="inputType === 'password'"` ensures logic only applies to password mode |
| **Visual cleanliness** | `style="display: none"` removes the element from the layout flow |
| **Browser compatibility** | Using `type="text"` instead of `type="password"` avoids browsers ignoring `autocomplete="off"` on actual password fields |
| **Seamless API** | Developers only need to set the `input-type` prop; the component handles the hidden field automatically |

## Practical Usage Examples

To activate the hidden autocomplete field in your Vue application, simply set the `input-type` prop to `"password"`:

```vue
<template>
  <v-otp-input
    v-model:value="otpCode"
    :num-inputs="6"
    input-type="password"
    :should-auto-focus="true"
    @on-complete="handleComplete"
  />
</template>

<script setup lang="ts">
import { ref } from 'vue';
import VOtpInput from 'vue3-otp-input';

const otpCode = ref('');
const handleComplete = (value: string) => {
  console.log('Secure OTP entered:', value);
};
</script>

```

When `input-type="password"` is active, inspecting the DOM reveals the hidden field immediately preceding the visible OTP inputs:

```html
<!-- Hidden autocomplete interceptor -->
<input autocomplete="off" name="hidden" type="text" style="display: none">
<!-- Visible OTP inputs follow -->
<input type="password" ...>
<input type="password" ...>

```

To toggle between visible and hidden OTP entry modes dynamically, bind the `input-type` prop to a reactive variable:

```vue
<v-otp-input
  v-model:value="securityCode"
  :num-inputs="4"
  :input-type="isSecureMode ? 'password' : 'tel'"
/>

```

## Summary

- **vue3-otp-input** automatically prevents browser autofill on password-type OTP fields by rendering a hidden decoy input.
- The hidden field uses `autocomplete="off"`, `name="hidden"`, and `style="display: none"` to intercept browser password managers.
- Located in [`src/components/vue3-otp-input.vue`](https://github.com/ejirocodes/vue3-otp-input/blob/main/src/components/vue3-otp-input.vue) at lines 221-227, the logic activates only when `input-type="password"`.
- Developers activate this protection by setting the `input-type` prop to `"password"` without additional configuration.

## Frequently Asked Questions

### Why does vue3-otp-input use a hidden text input instead of just adding autocomplete="off" to the password fields?

Browsers increasingly ignore `autocomplete="off"` on actual `type="password"` inputs to ensure password managers remain accessible for user convenience. By injecting a hidden `type="text"` field with `autocomplete="off"` before the visible password inputs, the component tricks the browser into targeting the decoy field for autofill, effectively protecting the OTP entry fields from unwanted password manager interference.

### How do I verify that the hidden autocomplete field is actually rendering in my application?

Inspect the DOM using your browser's developer tools immediately before the visible OTP input elements. When `input-type="password"` is active, you should see an `<input>` element with attributes `name="hidden"`, `autocomplete="off"`, `type="text"`, and `style="display: none"` positioned directly before the first visible OTP field. If you switch to `input-type="tel"` or `"number"`, this hidden element should disappear from the DOM.

### Does the hidden input field affect form submission or accessibility?

The hidden input does not impact form submission because it lacks a `value` attribute and carries `name="hidden"`, which typically falls outside standard form data collection patterns. For accessibility, since the element uses `style="display: none"`, it is removed from the accessibility tree and will not be announced by screen readers or navigable via keyboard, ensuring it remains a purely technical artifact for browser autofill prevention without degrading user experience.

### Can I customize the hidden autocomplete field attributes or disable this behavior entirely?

The hidden field implementation is hardcoded in [`src/components/vue3-otp-input.vue`](https://github.com/ejirocodes/vue3-otp-input/blob/main/src/components/vue3-otp-input.vue) at lines 221-227 and activates automatically whenever `input-type="password"` is specified. There is currently no exposed prop to modify the hidden field's attributes or disable this protection mechanism. If you require different autofill behavior, you would need to fork the repository and modify the template logic directly, or use `input-type="tel"` or `"number"` instead, which bypasses the hidden field rendering entirely.