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No:12515

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Basketball game
Developer User5157｜Date and time 23/8/19 0:52:00
Build time 34.484 sec｜Game capacity 5.39KB｜

Script

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

<!DOCTYPE html>
<html>
  <head>
    <title>Basketball Game</title>
    <style>
      #canvas {
        border: 2px solid black;
      }
    </style>
  </head>
  <body>
    <canvas id="canvas" width="400" height="600"></canvas>
    <script>
      const canvas = document.getElementById('canvas');
      const context = canvas.getContext('2d');

// Ball Properties
      let ballX = canvas.width / 2;
      let ballY = canvas.height - 30;
      const ballRadius = 10;
      let dx = 2;
      let dy = -2;

// Paddle Properties
      const paddleHeight = 10;
      const paddleWidth = 75;
      let paddleX = (canvas.width - paddleWidth) / 2;
      let rightPressed = false;
      let leftPressed = false;

// Brick Properties
      const brickRowCount = 3;
      const brickColumnCount = 5;
      const brickWidth = 75;
      const brickHeight = 20;
      const brickPadding = 10;
      const brickOffsetTop = 30;
      const brickOffsetLeft = 30;
      const bricks = [];

for (let c = 0; c < brickColumnCount; c++) {
        bricks[c] = [];
        for (let r = 0; r < brickRowCount; r++) {
          bricks[c][r] = { x: 0, y: 0, status: 1 };
        }
      }

let score = 0;
      let lives = 3;

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

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

function drawScore() {
        context.font = '16px Ariel';
        context.fillStyle = '#0095DD';
        context.fillText('Score: ' + score, 8, 20);
      }

function drawLives() {
        context.font = '16px Ariel';
        context.fillStyle = '#0095DD';
        context.fillText('Lives: ' + lives, canvas.width - 65, 20);
      }

function draw() {
        context.clearRect(0, 0, canvas.width, canvas.height);
        drawBricks();
        drawBall();
        drawPaddle();
        drawScore();
        drawLives();
        collisionDetection();

// Ball Movement
        ballX += dx;
        ballY += dy;

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

if (ballY + dy < ballRadius) {
          dy = -dy;
        } else if (ballY + dy > canvas.height - ballRadius) {
          if (ballX > paddleX && ballX < paddleX + paddleWidth) {
            dy = -dy;
          } else {
            lives--;
            if (!lives) {
              alert('Game Over! Try again.');
              document.location.reload();
            } else {
              ballX = canvas.width / 2;
              ballY = canvas.height - 30;
              dx = 2;
              dy = -2;
              paddleX = (canvas.width - paddleWidth) / 2;
            }
          }
        }

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

requestAnimationFrame(draw);
      }

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

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

document.addEventListener('keydown', keyDownHandler);
      document.addEventListener('keyup', keyUpHandler);

draw();
    </script>
  </body>
</html>