Javascript实现鼠标拖尾特效

鼠标特效需要使用定时器setTimeout在固定时间生成节点,删除节点,生成的节点赋予随机的宽高,随机颜色,使每个特效节点都看起来不一样

注意:生成的节点需要设置绝对定位,使其脱离文档流,不影响页面中其他元素的位置

代码示例:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>鼠标特效</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        
        body {
            background-color: #9df;
            overflow: hidden;
            height: 100vh;
        }
        
        span {
            height: 30px;
            width: 30px;
            border-radius: 50%;
            position: absolute;
            pointer-events: none;
            transform: translate(-50%, -50%);
            box-shadow: 10px 10px 30px #45f, -10px -10px 30px #d80;
            animation: box 5s linear infinite;
            z-index: 3;
        }
        
        @keyframes box {
            0% {
                transform: translate(-50%, -50%);
                opacity: 1;
                filter: hue-rotate(0deg);
            }
            100% {
                transform: translate(-50%, -1000%);
                opacity: 1;
                filter: hue-rotate(720deg);
            }
        }
    </style>
</head>

<body>

</body>

</html>
<script>
    document.addEventListener("mousemove", function(e) {
        var body = document.querySelector("body");
        var span = document.createElement("span");
        var x = e.offsetX
        var y = e.offsetY
        span.style.left = x + "px"
        span.style.top = y + "px";

        console.log(x + ">>>" + y)
        var a = Math.random() * 30;
        span.style.width = 30 + a + "px";
        span.style.height = 30 + a + "px";
        body.appendChild(span);
        setTimeout(function() {
            span.remove();
            // console.log("ok")
        }, 4500)
    })
</script>

运行结果:

0CE20E7B-E5EB-2CB3-780B-B2EDB2008C4E.png

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