NIN Validation

A simple JavaScript utility for validating National Identification Number (NIN) formats and toggling instruction visibility.
Works in both Node.js and browser environments.

Installation

npm install nin-validation

Features

• ✅ Validate NIN numbers against a predefined pattern (XXXXXXXX0XX or XXXXXXXX1XX)
• ✅ Attach validation directly to input fields
• ✅ Toggle visibility of NIN instruction elements
• ✅ Works in vanilla JS, React, Vue, Angular, and other modern frameworks

Usage

1. Import the library

Node.js / CommonJS

const { validateNINField, attachNINValidation, attachToggleInstructions } = require('nin-validation');

ES Modules

import { validateNINField, attachNINValidation, attachToggleInstructions } from 'nin-validation';

2. Validate a NIN directly

console.log(validateNINField("12345678012")); // true
console.log(validateNINField("98765432199")); // false

3. Attach validation to an input field

HTML:

<input type="text" id="txtNIN" />
<span id="labelNINerror" style="display:none;color:red;">Invalid NIN</span>

JavaScript:

attachNINValidation('txtNIN', 'labelNINerror');

4. Toggle NIN instructions

HTML:

<button class="thumb">ℹ️</button>
<div id="ninInstructions" style="display:none;">Enter your 8-digit number followed by 3 digits where the first of the last 3 is 0 or 1.</div>

JavaScript:

attachToggleInstructions('.thumb', '#ninInstructions');

License

MIT License