Question

您知道如何更改背景颜色。我尝试使用

body.darkmode{
background-color:black;
color: white;

仍然无法正常工作。我的代码也很混乱，因为我昨天才开始使用html进行编码。所以这是我第一次我想制作一个暗模式版本。因此，请不要担心内容，因为它仅用于演示。我昨天也发表了类似的帖子，但是在这种情况下，我放了一些滚动条和导航栏。

<!DOCTYPE html>
<html>
<head>
  <title>UwU</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>

#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>


<div style="padding:15px 15px 2500px;font-size:15px">

<script>
// When the user scrolls down 20px from the top of the document, slide down the navbar
window.onscroll = function() {scrollFunction()};

function scrollFunction() {
  if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
    document.getElementById("navbar").style.top = "0";
  } else {
    document.getElementById("navbar").style.top = "-50px";
  }
}
</script>
<style>
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #4CAF50;
  color: white;
}
</style>
</head>
<body>

<div class="topnav">
  <a class="active" href="#home">Home</a>
  <a href="#UwU">News</a>
  <a href="#UwU">Contact</a>
  <a href="#Settings">Settings</a>
</div>


<style>
h1 {text-align: center;}
p {text-align: left;}
div {text-align: left;}
.left {
  display: block;
  margin-left: auto;
  margin-right: auto;
}
</style>
</head>
<body>

<h1>UwU</h1>
<p>you just got uwu.</p>
<p>say uwu after you saw master uwu for ton of luck UwU</p>
<div>UwU.</div>
<p></p>
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</body>
</html>
    <style type ="text/css" >
      .footer{ 
          position: fixed;     
          text-align: left;    
          bottom: 0px; 
          width: 100%;
          color: black;
      }  
   </style>
   </head>
   <body>
       <div class="footer">Made by rama 4/6/2020
       <a href="D:\HTML\test.html" target="_self"><br>use light mode</a><a>•••</a><a href="">Page 2 UwU</a>
       </div>
       
   </body>

Answer 1

您尚未将class = "darkmode"添加到body标签。

添加它，它应该可以工作。

<body class = "darkmode">

更改背景颜色

1 个答案: