otp-generator-module/dist/index.js

A simple and flexible OTP (One-Time Password) generator module for JavaScript and TypeScript. Supports numeric, alphabetic, and special character combinations with customizable options.

export const generateOTP = (options = {}) => {
    const { upperCase = false, alphabets = false, specialChars = false, length = 4, } = options;
    let characters = '0123456789';
    if (alphabets)
        characters += 'abcdefghijklmnopqrstuvwxyz';
    if (upperCase)
        characters += 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    if (specialChars)
        characters += '!@#$%^&*()';
    if (!characters.length) {
        throw new Error('No character sets selected for OTP generation.');
    }
    let otp = '';
    for (let i = 0; i < length; i++) {
        const index = Math.floor(Math.random() * characters.length);
        otp += characters[index];
    }
    return otp;
};