🟨 Daily Code 38 | The Document Object Model (DOM) 3 (🪨📃✂️)
Tags: javascript, beginners, daily
Published: 2024-01-14 06:29:25

Alright, as promised yesterday I’m now going to use my newly learned JavaScript to improve the Rock Paper Scissors game from a few days ago. Lets do it!

# My Code

```html
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Rock Paper Scissors</title>
</head>

<body>
    <p>Rock Paper Scissors</p>
    <button onclick="
        playGame('rock')
">Rock</button>
    <button onclick="
        playGame('paper');
">Paper</button>
    <button onclick="
        playGame('scissors');
">Scissors</button>

    <p class="js-result">_</p>
    <p class="js-moves">_</p>
    <p class="js-score"></p>

    <button onclick="
        score.wins = 0;
        score.losses = 0;
        score.ties = 0;
        localStorage.removeItem('score');
        document.querySelector('.js-result').innerHTML = '_'
        document.querySelector('.js-moves').innerHTML = '_'
        updateScoreElement();
    ">Reset Score</button>

    <script>
        let score = JSON.parse(localStorage.getItem('score')) || {
            wins: 0,
            losses: 0,
            ties: 0
        };

        updateScoreElement();

        function playGame(playerMove) {
            const computerMove = pickComputerMove();

            let result = '';

            if (playerMove === 'scissors') {
                if (computerMove === 'rock') {
                    result = 'You lose.';
                } else if (computerMove === 'paper') {
                    result = 'You win.';
                } else if (computerMove === 'scissors') {
                    result = 'Tie.';
                }

            } else if (playerMove === 'paper') {
                if (computerMove === 'rock') {
                    result = 'You win.';
                } else if (computerMove === 'paper') {
                    result = 'Tie.';
                } else if (computerMove === 'scissors') {
                    result = 'You lose.';
                }

            } else if (playerMove === 'rock') {
                if (computerMove === 'rock') {
                    result = 'Tie.';
                } else if (computerMove === 'paper') {
                    result = 'You lose.';
                } else if (computerMove === 'scissors') {
                    result = 'You win.';
                }
            }

            if (result === 'You win.') {
                score.wins++;
            } else if (result === 'You lose.') {
                score.losses++;
            } else if (result === 'Tie.') {
                score.ties++;
            }

            localStorage.setItem('score', JSON.stringify(score));

            updateResultElement(result);
            updateMovesElement(playerMove, computerMove);
            updateScoreElement();

        }

        function updateResultElement(result) {
            document.querySelector('.js-result')
                .innerHTML = `${result}`;
        }

        function updateMovesElement(playerMove, computerMove) {
            document.querySelector('.js-moves')
                .innerHTML = `You picked ${playerMove}. Computer picked ${computerMove}.`;
        }

        function updateScoreElement() {
            document.querySelector('.js-score')
                .innerHTML = `Wins: ${score.wins}, Losses: ${score.losses}, Ties: ${score.ties}`;
        }

        function pickComputerMove() {
            let computerMove = '';
            const randomNumber = Math.random();
            if (randomNumber >= 0 && randomNumber < 1 / 3) {
                computerMove = 'rock';
            } else if (randomNumber >= 1 / 3 && randomNumber < 2 / 3) {
                computerMove = 'paper';
            } else {
                computerMove = 'scissors';
            };

            return computerMove;
        }
    </script>
</body>

</html>
```

This code gives me a strange feeling of satisfaction. Before using JS was so weird, and now I know the syntax to manipulate HTML. 😌😌😌 can’t wait to continue the course later today or tomorrow!