Untitled

<!DOCTYPE html>
<html>
<title>Rock Paper Scissors Game</title>
<head>
<script>
const getUserChoice = userInput => {
  userInput = userInput.toLowerCase();
  if(userInput === 'rock' || userInput === 'paper' || userInput === 'scissors' || userInput === 'bomb'){
      return userInput;
  }
 return 'error';
}

function getComputerChoice() {
  var rand = Math.floor(Math.random() * 4);
  var res = '';
  switch(rand) {
    case 1:
      res = 'rock';
      break;
    case 2:
      res = 'paper';
      break;
    case 3:
      res = 'scissors';
      break;
      default:
      res = "scissors";
      break;
  }
  return res;
}
function determineWinner(userChoice, computerChoice) {
  if(userChoice === computerChoice) {
    return 'Game was a tie.';
  }
  if(userChoice === 'rock') {
      if(computerChoice === 'paper') {
         return 'Computer won';
      } else {
        return 'user won';
      }
  }
  if(userChoice === 'paper') {
     if(computerChoice === 'scissors') {
       return 'computer won';
     } else {
          return 'user won';
     }
  }
  if(userChoice == 'scissors') {
    if(computerChoice === 'rock') {
      return 'computer won';
    } else {
      return 'user won';
    }
  }
  if(userChoice === 'bomb') {
     return 'user won';
  }
}

function playGame() {
  var userChoice = getUserChoice('scissors');
  var computerChoice = getComputerChoice();
  console.log("User: " + userChoice);
  console.log("Computer: " + computerChoice);
  console.log(determineWinner(userChoice, computerChoice));
}
playGame();
</script>
</head>
<body>
</body>
</html>