ngx-otp-inputs

Angular OTP (One Time Password) input component with Web OTP support, reactive forms integration and flexible configuration.

✨ Major Features

✅ Customizable length (e.g. 4, 6, etc.)
✅ Numeric or alphanumeric codes
✅ Masked or plain text inputs
✅ Web OTP API integration (auto-read codes from SMS)
✅ Compatible with Reactive Forms (ControlValueAccessor)
✅ Easy error handling via outputs
✅ Standalone Angular Component
✅ Lightweight and dependency-free (except Angular itself)

🚀 Installation

Install the package via npm:

npm install --save ngx-otp-code

or with yarn:

yarn add ngx-otp-code

⚙️ Basic Usage

Import the Component

If you’re using Angular standalone components:

import { NgxOtpCodeComponent } from 'ngx-otp-code';

Or import the module in your NgModule:

import { NgxOtpModule } from 'ngx-otp-code';

@NgModule({
  imports: [NgxOtpInputsModule]
})
export class YourModule {}

✅ Example with Reactive Forms

// your.component.ts

import { Component } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-my-form',
  templateUrl: './my-form.component.html'
})
export class MyFormComponent {
  form: FormGroup;

  otpConfig = {
    length: 6,
    inputType: 'number',
    autoFocus: true,
    placeholder: '*',
    mask: false,
    useWebOtp: true
  };

  constructor(private fb: FormBuilder) {
    this.form = this.fb.group({
      otp: ['']
    });
  }

  submit() {
    console.log(this.form.value.otp);
  }

  handleOtpError(msg: string) {
    console.error(msg);
  }

  handleCodeFilled(code: string) {
    console.log('OTP complete:', code);
  }
}

Template

<form [formGroup]="form" (ngSubmit)="submit()">
  <ngx-otp-code
    formControlName="otp"
    [config]="otpConfig"
    (error)="handleOtpError($event)"
    (codeFilled)="handleCodeFilled($event)"
  ></ngx-otp-code>

  <button type="submit">Submit</button>
</form>

🔧 Configuration Options

Pass a single config object to customize behavior:

| Property | Type | Default | Description | | | ------------- | --------- | ---------- | ---------------------------------- | ---------- | | length | number | 6 | Number of OTP inputs | | | inputType | `'text' | 'number'` | 'text' | Input type | | placeholder | string | '' | Placeholder for each input box | | | autoFocus | boolean | true | Autofocus first input | | | isAlpha | boolean | false | Allow letters and numbers | | | mask | boolean | false | Mask input values (password style) | | | useWebOtp | boolean | false | Enable Web OTP API | |

📤 Outputs

(error)

Emits a string describing any error, e.g. invalid paste:

(error)="handleOtpError($event)"

(codeFilled)

Emits the complete OTP code as soon as all digits are filled:

(codeFilled)="handleCodeFilled($event)"

🔐 Web OTP API

This component supports the Web OTP API for automatically reading codes from SMS messages.

✅ Works only over HTTPS ✅ Not supported in all browsers

Enable it by setting:

[config]="{ useWebOtp: true }"

🎨 Custom Styling

ngx-otp-code is designed to be styled exclusively via CSS classes for full flexibility and theme compatibility. There are no inline styles in the component, giving you full control over its appearance.

Default Classes

By default, the component generates these classes:

• .otp-container → wraps all input fields.
• .otp-input → applied to every input field.

Custom Classes

You can provide your own classes via the config object:

• containerClass → custom class for the container.
• inputClass → custom class for all inputs.

Example:

<ngx-otp-code
  [config]="{
    length: 6,
    inputType: 'text',
    mask: false,
    placeholder: '*',
    inputClass: 'my-otp-input',
    containerClass: 'my-otp-container'
  }"
  [formControl]="otpControl">
</ngx-otp-inputs>

🎯 Styling Tips

✅ Define your styles globally or in SCSS files used in your Angular app. ✅ Use Angular’s ViewEncapsulation to control whether styles are global or component-scoped. ✅ Create themes or dark mode simply by switching classes.

🎯 Compatibility

Angular 17+

Modern browsers

📦 License

MIT © 2025

☕ Buy Me a Coffee

If you find this library helpful, you can support my work:

👉 Buy Me a Coffee

🔎 Keywords

angular, otp, web-otp, otp-input, code-input, pin-input, one-time-password, ngx-otp-inputs, angular-library, two-factor-auth, authentication