# 记录当前页面位置，返回 （龙泉司法项目）
需求: 从a页面进入b页面之后，然后返回a页面，要返回a页面固定的位置，
demo代码如下
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>记录当前页面位置，返回</title>
<style>
.box {
height: 3000px;
background: yellowgreen;
}
button {
position: fixed;
top: 120px;
}
</style>
</head>
<body>
<div class="box">
asdkjfyasdf
</div>
<button class="buttonA">A按钮</button>
</body>
</html>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.4/jquery.js"></script>
<script>
// 页面进入返回之前固定的位置
function scrollToTop() {
var aatop = localStorage.getItem('top')
$(window).scrollTop(aatop);
}
scrollToTop()
window.addEventListener('scroll', function () {
var scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
console.log(scrollTop);
localStorage.setItem('top', scrollTop)
})
$('.buttonA').on("click", function () {
// var top = localStorage.getItem('top')
// window.location.href = "bb.html?top=" + top;
window.location.href = "bb.html" ;
});
</script>
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