Regex Password Validation

You need to write regex that will validate a password to make sure it meets the follwing criteria:

• At least six characters long
• contains a lowercase letter
• contains an uppercase letter
• contains a number

  function validate(password) {
    return /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[a-zA-Z0-9]{6,}$/.test(password);
  }