Sample Pong game with buttons and objects to destroy's game

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No:47510

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Sample Pong game with buttons and objects to destr..ALL
Developer User20368｜Date and time 24/2/28 5:47:31
Build time 15.427 sec｜Game capacity 3.106KB｜

Script

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[PR]現在の売れ筋ゲームアプリランキング

Click here for free DL of the app version that can save data.

<!DOCTYPE html>
<html>
<head>
    <title>Pong Game</title>
    <style>
        canvas {
            border: 1px solid black;
            display: block;
            margin: 0 auto;
        }
    </style>
</head>
<body>
    <canvas id="gameCanvas" width="800" height="600"></canvas>
    <button onclick="startGame()">Start Game</button>
    <button onclick="pauseGame()">Pause Game</button>
    <script>
        const canvas = document.getElementById("gameCanvas");
        const ctx = canvas.getContext("2d");

let paddleWidth = 100;
        let paddleHeight = 20;
        let paddleX = (canvas.width - paddleWidth) / 2;
        let ballRadius = 10;
        let ballX = canvas.width / 2;
        let ballY = canvas.height - 30;
        let dx = 2;
        let dy = -2;
        
        let rightPressed = false;
        let leftPressed = false;

document.addEventListener("keydown", keyDownHandler, false);
        document.addEventListener("keyup", keyUpHandler, false);

function keyDownHandler(e) {
            if (e.key === "Right" || e.key === "ArrowRight") {
                rightPressed = true;
            } else if (e.key === "Left" || e.key === "ArrowLeft") {
                leftPressed = true;
            }
        }

function keyUpHandler(e) {
            if (e.key === "Right" || e.key === "ArrowRight") {
                rightPressed = false;
            } else if (e.key === "Left" || e.key === "ArrowLeft") {
                leftPressed = false;
            }
        }

function drawPaddle() {
            ctx.beginPath();
            ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
            ctx.fillStyle = "#0095DD";
            ctx.fill();
            ctx.closePath();
        }

function drawBall() {
            ctx.beginPath();
            ctx.arc(ballX, ballY, ballRadius, 0, Math.PI * 2);
            ctx.fillStyle = "#0095DD";
            ctx.fill();
            ctx.closePath();
        }

function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawPaddle();
            drawBall();

if (rightPressed && paddleX < canvas.width - paddleWidth) {
                paddleX += 7;
            } else if (leftPressed && paddleX > 0) {
                paddleX -= 7;
            }

if (ballX + dx > canvas.width - ballRadius || ballX + dx < ballRadius) {
                dx = -dx;
            }

if (ballY + dy < ballRadius) {
                dy = -dy;
            } else if (ballY + dy > canvas.height - paddleHeight) {
                if (ballX > paddleX && ballX < paddleX + paddleWidth) {
                    dy = -dy;
                } else {
                    alert("Game Over");
                    document.location.reload();
                }
            }

ballX += dx;
            ballY += dy;
        }

function startGame() {
            setInterval(draw, 10);
        }

function pauseGame() {
            clearInterval(setInterval(draw, 10));
        }
    </script>
</body>
</html>