Generate hard password with using JavaScript <3

generatePassword.js

export const generatePassword = (
  length = 16,
  stringWithChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890'
) => {
  var pass = ''
  const chars = stringWithChars.split('')
  for (var j = 0; j < length; j++) {
    pass = pass + chars[Math.floor(Math.random() * (chars.length - 1 + 1))]
  }
  return pass
}