function generateAlphaOTP(length) { let chars = "0123456789abcdefghijklmnopqrstuvwxyz"; let otp = ""; for (let i = 0; i < length; i++) { otp += chars[Math.floor(Math.random() * chars.length)]; } return otp; }
<p id="otp"></p> <button onclick="document.getElementById('otp').innerText = generateOTP();"> Generate OTP </button>