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@@ -0,0 +1,66 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+<body>
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+ <button id="btn1">往下走</button>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <h2>哈哈哈哈哈哈</h2>
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+ <button id="btn2">往上走</button>
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+ <script>
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+ /**
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+ * JS:
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+ * BOM：Browser Object Model (浏览器 对象 模型)
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+ * DOM:Document Object Model (文档 对象 模型)
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+ * ECMAScript：es(2015,2020,2021 =>５，６，７，８)
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+ */
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+ //获取元素标签
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+ var btn1 = document.getElementById("btn1");
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+ var btn2 = document.getElementById("btn2");
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+ console.log(btn1,btn2,'按钮')
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+ // 给元素添加点击事件
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+ btn1.onclick = function() {
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+ // scrollTo(x,y)距离窗口跳转
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+ // scrollBy(x,y)距离自身跳转
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+ // 每一秒钟执行一件事
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+ // 定时器
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+ var timer = setInterval(function(){
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+ var scrollMain = document.documentElement.scrollTop || document.body.scrollTop;
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+ console.log(scrollMain,'12')
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+ console.log("执行")
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+ if(scrollMain <= 706) {
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+ scrollBy(0,200)
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+ } else {
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+ clearInterval(timer)
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+ }
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+ },1000)
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+ }
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+ </script>
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+</body>
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+</html>
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