javascript - 滚动时如何在菜单栏下隐藏日历

问题描述

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
  margin: 0;
  background-color: #f1f1f1;
  font-family: Arial, Helvetica, sans-serif;
}

#navbar {
  background-color: #333;
  position: fixed;
  top: 0;
  width: 100%;
  display: block;
  transition: top 0.3s;
}

#navbar a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 15px;
  text-decoration: none;
  font-size: 17px;
}

#navbar a:hover {
  background-color: #ddd;
  color: black;
}
</style>
</head>
<body>
<!-- jQuery -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>

<br />
<input id="datetimepicker" type="text" >

<div id="navbar">
  <a href="#home">Home</a>
  <a href="#news">News</a>
  <a href="#contact">Contact</a>
</div>

<div style="padding:15px 15px 2500px;font-size:30px;margin-top:30px;">
  <p><b>This example demonstrates how to hide a navbar when the user starts to scroll the page.</b></p>
  
  
  <p>Scroll down this frame to see the effect!</p>
  <p>Scroll up to show the navbar.</p>
  <p>Lorem ipsum dolor dummy text sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
  <p>Lorem ipsum dolor dummy text sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
</div>

<script>
$(function(){
  $('#datetimepicker').datetimepicker({
    inline:true,
    });
})
var prevScrollpos = window.pageYOffset;
window.onscroll = function() {
var currentScrollPos = window.pageYOffset;
  if (prevScrollpos > currentScrollPos) {
    document.getElementById("navbar").style.top = "0";
  } else {
    document.getElementById("navbar").style.top = "-50px";
  }
  prevScrollpos = currentScrollPos;
}
</script>


</body>
<!-- XDSoft DateTimePicker -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jquery-datetimepicker/2.5.20/jquery.datetimepicker.min.css" integrity="sha256-DOS9W6NR+NFe1fUhEE0PGKY/fubbUCnOfTje2JMDw3Y=" crossorigin="anonymous" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-datetimepicker/2.5.20/jquery.datetimepicker.full.min.js" integrity="sha256-FEqEelWI3WouFOo2VWP/uJfs1y8KJ++FLh2Lbqc8SJk=" crossorigin="anonymous"></script>
</html>

我在 Django 中使用以下日历： https ://xdsoft.net/jqplugins/datetimepicker/
问题是当向下滚动页面时，月历和年历组件会越过我的菜单栏。有办法解决这个问题吗？也许要覆盖日历或我的 HTML/Javascript 中的一些 css？
我在 w3school 的 HTML 示例中重现了我的场景。见代码被剪断。

标签： javascripthtmlcssdjango

不需要为内联日历设置如此高的 z-index 值，因为它不像默认日历那样显示在日期字段上。
而不是像月份和年份的下拉菜单那样使用z-index: 9999。z-index: 101解决方案是覆盖日历的 css：
```
 <script>
 .xdsoft_datetimepicker .xdsoft_label {
     z-index: 101 !important;
 }
 </script>
```

javascript - 滚动时如何在菜单栏下隐藏日历

问题描述

解决方案

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