HTML5小游戏源码是指使用HTML5技术开发的小型游戏源代码。这类游戏通常具有简单的玩法和较低的开发难度，适合初学者学习和实践。HTML5小游戏源码可以包括游戏逻辑、图形界面、音效等元素，开发者可以通过修改源码来创建自己的小游戏。
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF8">
<title>打砖块游戏</title>
<style>
canvas {
border: 1px solid black;
}
</style>
</head>
<body>
<canvas id="gameCanvas" width="480" height="320"></canvas>
<script>
var canvas = document.getElementById("gameCanvas");
var ctx = canvas.getContext("2d");
var ballRadius = 10;
var x = canvas.width / 2;
var y = canvas.height 30;
var dx = 2;
var dy = 2;
var paddleHeight = 10;
var paddleWidth = 75;
var paddleX = (canvas.width paddleWidth) / 2;
var rightPressed = false;
var leftPressed = false;
var brickRowCount = 3;
var brickColumnCount = 5;
var brickWidth = 75;
var brickHeight = 20;
var brickPadding = 10;
var brickOffsetTop = 30;
var brickOffsetLeft = 30;
var bricks = [];
for (var c = 0; c < brickColumnCount; c++) {
bricks[c] = [];
for (var r = 0; r < brickRowCount; r++) {
bricks[c][r] = { x: 0, y: 0, status: 1 };
}
}
document.addEventListener("keydown", keyDownHandler, false);
document.addEventListener("keyup", keyUpHandler, false);
document.addEventListener("mousemove", mouseMoveHandler, 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 mouseMoveHandler(e) {
var relativeX = e.clientX canvas.offsetLeft;
if (relativeX > 0 && relativeX < canvas.width) {
paddleX = relativeX paddleWidth / 2;
}
}
function drawBall() {
ctx.beginPath();
ctx.arc(x, y, ballRadius, 0, Math.PI * 2);
ctx.fillStyle = "#0095DD";
ctx.fill();
ctx.closePath();
}
function drawPaddle() {
ctx.beginPath();
ctx.rect(paddleX, canvas.height paddleHeight, paddleWidth, paddleHeight);
ctx.fillStyle = "#0095DD";
ctx.fill();
ctx.closePath();
}
function drawBricks() {
for (var c = 0; c < brickColumnCount; c++) {
for (var r = 0; r < brickRowCount; r++) {
if (bricks[c][r].status == 1) {
var brickX = (c * (brickWidth + brickPadding)) + brickOffsetLeft;
var brickY = (r * (brickHeight + brickPadding)) + brickOffsetTop;
bricks[c][r].x = brickX;
bricks[c][r].y = brickY;
ctx.beginPath();
ctx.rect(brickX, brickY, brickWidth, brickHeight);
ctx.fillStyle = "#0095DD";
ctx.fill();
ctx.closePath();
}
}
}
}
function collisionDetection() {
for (var c = 0; c < brickColumnCount; c++) {
for (var r = 0; r < brickRowCount; r++) {
var b = bricks[c][r];
if (b.status == 1) {
if (x > b.x && x < b.x + brickWidth && y > b.y && y < b.y + brickHeight) {
dy = dy;
b.status = 0;
}
}
}
}
}
function draw() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
drawBricks();
drawBall();
drawPaddle();
collisionDetection();
if (x + dx > canvas.width ballRadius || x + dx < ballRadius) {
dx = dx;
}
if (y + dy < ballRadius) {
dy = dy;
} else if (y + dy > canvas.height ballRadius) {
if (x > paddleX && x < paddleX + paddleWidth) {
dy = dy;
} else {
alert("游戏结束");
document.location.reload();
clearInterval(interval); // Needed for Chrome to end game
}
}
if (rightPressed && paddleX < canvas.width paddleWidth) {
paddleX += 7;
} else if (leftPressed && paddleX > 0) {
paddleX = 7;
}
x += dx;
y += dy;
}
var interval = setInterval(draw, 10);
</script>
</body>
</html> 将以上代码复制到一个名为index.html的文件中，然后用浏览器打开该文件即可运行游戏。
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