~小仙女~
~小仙女~

JS——红包雨（抢红包）

JS实现红包雨

这里只是一个效果的实现，没有添加更多复杂的业务逻辑，方便直接拿来使用

PS.该版本会出现卡顿的情况，暂时还未解决，所以重新使用css新属性实现了一个：https://blog.csdn.net/baidu_41604826/article/details/103494543

页面

<!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>红包雨</title>
    <style>
        html,body{
            width: 100%;
            height: 100%;
        }
        section{
            width: 100%;
            height: 100%;
            background: green;
            overflow: hidden;
        }
    ul,li{
        list-style: none;
        margin: 0;
    }
    #redList{
         position: relative;
         width: 100%;
         height: 100%;
    }
    #redList>li{
        position: absolute;
        top:0;
        left: 0;
    }
    </style>
</head>
<body>
    <section>
        <ul id="redList">
            
        </ul>
    </section>

    <script type="text/javascript" src="./jquery-3.1.1.min.js"></script>
    <script>
        //渲染红包列表，如果有多个
        function redRender(){
            var redListObj = $('#redList');
            var html = '';
            const redData = ["red1", "red2", "red3", "red4", "red5", "red6", "red7", "red8", "red9", "red10"];
            for (var i = 0;i<redData.length;i++){
                html+="
  • +redData[i] +".png"+ " alt=red"+">
    • "    
            }
            redListObj.html(html)
        }
        redRender()
        //红包的运动
        function moveRed(obj){
            var redArr = $('#redList>li');
            if(obj){
                obj.css({position:'absolute',top:randomNum(-2000,-80)+'px',left:randomNum(20,$('section').width()-20)});
                obj.animate({top:$('section').height()},randomNum(1000,5000),'linear',function(){
                  moveRed(obj)
                })
            }else{
                for(let i = 0;i<redArr.length;i++){
                    redArr.eq(i).css({position:'absolute',top:randomNum(-2000,-80)+'px',left:randomNum(20,$('section').width()-20)});
                    redArr.eq(i).animate({top:$('section').height()},randomNum(1000,5000),'linear',function(){
                        moveRed(redArr.eq(i))
                    })
                }
            }
            
        }
        moveRed()
        
        //随机生成某个区间之内的数
        function randomNum(minNum,maxNum){
            switch(arguments.length){
                case 1:
                    return parseInt(Math.random()*minNum+1,10);
                break;
                case 2:
                    return parseInt(Math.random()*(maxNum-minNum+1)+minNum,10);
                break;
                    default:
                        return 0;
                    break;
            }
        }
    </script>
</body>
</html>

    图片格式如下
    JS——红包雨（抢红包）_第1张图片

    效果：
    JS——红包雨（抢红包）_第2张图片

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