写一个刮刮乐的前端代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>刮刮乐游戏</title>
<style>
body {
background-color: #fff;
}
canvas {
margin: 50px auto;
display: block;
border: 1px solid #000;
}
#content {
margin: 50px auto;
text-align: center;
font-size: 24px;
font-weight: bold;
}
</style>
</head>
<body>
<canvas id="canvas" width="400" height="400"></canvas>
<div id="content">刮刮乐游戏</div>
<script>
window.onload = function() {
// 获取canvas元素
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
<pre><code> // 绘制底层图像
ctx.fillStyle = "#ccc";
ctx.fillRect(0, 0, canvas.width, canvas.height);
// 绘制上层图像
ctx.fillStyle = "#000";
ctx.font = "bold 40px Arial";
ctx.fillText("刮刮乐", 100, 200);
// 添加鼠标事件
canvas.addEventListener("mousemove", function(e) {
// 获取鼠标在canvas上的坐标
var x = e.offsetX;
var y = e.offsetY;
// 判断是否刮开了足够多的区域
var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
var pixels = imageData.data;
var count = 0;
for (var i = 0; i < pixels.length; i += 4) {
if (pixels[i + 3] === 0) {
count++;
}
}
if (count >= pixels.length / 8) {
// 刮开了足够多的区域，显示中奖信息
var content = document.getElementById("content");
content.innerHTML = "恭喜你中奖了！";
}
// 绘制刮开的图像
ctx.beginPath();
ctx.arc(x, y, 20, 0, Math.PI * 2);
ctx.fill();
});
};
</code></pre>
</script>
</body>
</html>
原文地址: https://www.cveoy.top/t/topic/bwnf 著作权归作者所有。请勿转载和采集!