lovecoding
/
web0715


			
				
					
						
						
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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">
    <title>Document</title>
    <style>
        .div1{
            width: 300px;
            height: 100px;
            border:5px solid green;
            overflow:scroll;
        }
        .div2{
            width: 1000px;
            height: 100px;
            background-image: linear-gradient( to right,red,blue);
        }
        ::-webkit-scrollbar{
          display: none;
          width: 0;
          height: 0;  
        }
        .box{
            width: 100px;
            height: 1000px;
            background-image: linear-gradient(to bottom,red,green);
        }
    </style>
</head>
<body>
    <div class="div1">
        <div class="div2"></div>
    </div>
    <div class="box">

    </div>
    <button onclick="backtop()">返回顶部</button>
    <script>
        window.onscroll = function(){
            // console.log("scroll");
            console.log("滚动距离顶部距离",document.documentElement.scrollTop);
            console.log("可滚动区域高度",document.documentElement.scrollHeight);
            console.log("视口高度",document.documentElement.clientHeight);

        }
        function backtop(){
            console.log("com")
            // window.scrollTo(0,0)
            window.scrollTo({
                top:0,
                behavior:"smooth"
            })
        }
    </script>
</body>
</html>