Create Random Password

random_password.js

function randomPassword(length=8,input='alpha-numeric') {
  var alphabet = 'abcdefghijklmnopqrstuvwxyz';
  var password = '';
  if(input == 'alpha') {
    alphabet = 'abcdefghijklmnopqrstuvwxyz';
  } else if(input == 'alpha-caps') {
    alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
  } else if(input == 'alpha-numeric') {
    alphabet = 'abcdefghijklmnopqrstuvwxyz1234567890';
  } else if(input == 'alpha-numeric-caps') {
    alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
  } else if(input == 'alpha-numeric-symbols') {
    alphabet = 'abcdefghijklmnopqrstuvwxyz1234567890~!@#$%^&*()_+-=';
  } else if(input == 'alpha-numeric-caps-symbols') {
    alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890~!@#$%^&*()_+-=';
  }
  var alphabet_length = alphabet.length - 1;
  for (var i = 0; i < length; i++) {
    var random_number = Math.floor(Math.random() * alphabet_length) + 1;
    password += alphabet[random_number];
  }
  return password;
}

console.log('Default : ', randomPassword());
console.log('Default with password length : ', randomPassword(20));
console.log('Alpha : ', randomPassword(12,'alpha'));
console.log('Alpha Caps : ', randomPassword(12,'alpha-caps'));
console.log('Alpha Numeric : ', randomPassword(12,'alpha-numeric'));
console.log('Alpha Numeric Caps : ', randomPassword(12,'alpha-numeric-caps'));
console.log('Alpha Numeric Symbols : ', randomPassword(12,'alpha-numeric-symbols'));
console.log('Alpha Numeric Caps Symbols : ', randomPassword(12,'alpha-numeric-caps-symbols'));