用canvas画个刮刮乐吧

最新推荐文章于 2024-09-24 22:18:51 发布

柒月梦

最新推荐文章于 2024-09-24 22:18:51 发布

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分类专栏：小demo 文章标签： canvas

本文链接：https://blog.youkuaiyun.com/guo187/article/details/87896959

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本文介绍了一款基于HTML、CSS和JavaScript实现的互动式刮刮乐抽奖游戏，玩家可以通过鼠标在画布上刮开遮罩，揭示隐藏的奖项。奖项随机设定，包括特等奖、一、二、三等奖及谢谢参与。

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>刮刮乐</title>
    <style>
        .prize {
            position: absolute;
            width: 300px;
            height: 150px;
            text-align: center;
            line-height: 150px;
            font-size: 30px;
            color: red;
        }
        #canvas{
            border: 1px solid #000;	
            position: absolute;
            z-index: 2;
        }
    </style>
</head>
<body>
    <canvas id='canvas' width="300" height="150"></canvas>
    <div class="prize"></div>
    <script>
        window.onload = function(){
            //获取画布对象
            var canvas = document.querySelector('#canvas');
            // 获取二维绘图对象
            var ctx = canvas.getContext('2d');
            // 遮罩颜色
            ctx.fillStyle = "#999";
            ctx.fillRect(0,0,300,150);
            // 鼠标按下
            canvas.onmousedown = function(){
                // 鼠标移动
                canvas.onmousemove = function(e){
                    //清除
                    ctx.clearRect(e.clientX,e.clientY,15,15);
                }
            }
            // 鼠标放开
            canvas.onmouseup = function(){
                canvas.onmousemove = null;
            }
            // 奖项设置
            var arr = ["特等奖","一等奖","一等奖","二等奖","二等奖","二等奖","二等奖",
            "二等奖","二等奖","二等奖","谢谢参与","谢谢参与","谢谢参与","谢谢参与","谢谢参与"];
            // 随机取
            var i = Math.floor(Math.random()*arr.length);
            document.querySelector('.prize').innerHTML = arr[i];
        }
    </script>
</body>
</html>