index.html

<script>
    function computerPlay(){
        let pick = Math.floor(Math.random()*3);
        if (pick == 0){
            return("rock");
        } else if (pick == 1){
            return("paper");
        } else if (pick == 2) {
            return("scissors");
        }
    }
    
    function playRound() {
        let playerPickUnparsed = prompt("Type either: rock, paper, or scissors")
        playerPick = stringToLowerCase(playerPickUnparsed);
        let computerPick = computerPlay();
        alert("The computer picked " + computerPick + "!");
        if (playerPick == computerPick) {
            return("It's a tie!")
        } else if (playerPick == "rock"){
            if (computerPick == "paper"){
                return("You lose! Paper beats rock.");
            } else if (computerPick == "scissors"){
                return("You win! Rock beats scissors.");
            }
        } else if (playerPick == "paper"){
            if (computerPick == "rock"){
                return("You win! Paper beats rock.");
            } else if (computerPick == "scissors"){
                return("You lose! Scissors beats paper.");
            }
        } else if (playerPick == "scissors"){
            if (computerPick == "paper"){
                return("You win! Scissors beats paper.");
            } else if (computerPick == "rock"){
                return("You lose! Rock beats scissor.");
            }
        }
    }

    function game() {
        let playerWins = 0;
        let computerWins = 0;
        let ties = 0;
        let winner = "";

        //play 5 rounds and keep track of score
        for(round = 0; round < 5; round++){
            alert("Round " + (round+1) + ", GO!");
            roundMessage = playRound();
            alert(roundMessage);
            if (roundMessage.includes("win")){
                playerWins +=1;
            } else if (roundMessage.includes("lose")){
                computerWins +=1;
            } else {
                ties +=1;
            }
        }
        
        //compute and display winner
        if (playerWins > computerWins) {
            winner = "The player"
        } else  if (playerWins < computerWins){
            winner = "The computer"
        } else {
            winner = "Nobody"
        }

        alert(winner + " wins! You had " + playerWins + " wins and the computer had " + computerWins + " wins.");
    }

    function stringToLowerCase(text) {
        let lowerCased = "";
        for (i = 0; i < text.length; i++){
            lowerCased += text[i].toLowerCase();
        }
        return lowerCased;
    }


    game();
</script>