Question

因此我在后台有一个视频，我试图在该视频上放置一个导航栏。因此，我使它们都可以单独工作，但是当我将它们放在一起时，视频将覆盖导航栏。现在我不知道这是怎么回事。我已经添加了尝试重新排列代码的尝试，以及在网上寻找指南的过程，但仍未找到任何细节。

这是我的html代码：

    *{
	margin: 0;
	padding: 0;
    }
    .container{
	width: 90%;
	margin: 0 auto
    }
    .navbar {
	width:100%;
	overflow: hidden;
	height: 40px;
	line-height: 40px;
	background: #fff;
	border-bottom: 2px solid black;
    }
    .logo{
	width: 80px;
	float:left;
    }

    /* this is for ul tag */
    .menu{
	float:right;
    }
    .menu li{
	float:left;
	width:120px;
	height: 40px;
	line-height: 40px;
	text-align: center;
	list-style: none;
    }
    .menu li a{
	color: #000;
	text-decoration: none;
	font-family: calibri;
	text-transform: uppercase;
	display:block;
    }
    .menu li:hover{
	background: #dc3545
    }
    .menu li a:hover{
	color: #fff
    }
    #myVideo {
	position: fixed;
	right: 0;
	bottom: 0;
	min-width: 100%; 
	min-height: 100%;
	filter: brightness(25%);
    }

    <head>
	<title>Guide to Sheffield Student Nightlife - Home Page</title>
	<link rel="stylesheet" href="C:\Users\paulk\Desktop\Web Dev\style.css">
</head>

	<body>
	
	<div class="navbar">
		<div class="container">
			<div class="logo_div">
				<a href="https://www.google.com/"><img src="C:\Users\paulk\Desktop\Web Dev\TheGuide.png" alt="" class="logo"></a>
			</div>
			<div class="navbar_links">
				<ul class="menu">
					<li><a href="#">Home</a></li>
					<li><a href="#">Page 1</a></li>
					<li><a href="#">Page 2</a></li>
					<li><a href="#">About us</a></li>
				</ul>
			</div>
		</div>
	</div>
			<video playsinline autoplay muted loop poster="TheGuide.jpg" id="myVideo">
				<source src="C:\Users\paulk\Desktop\Web Dev\Fire.mp4" type="video/mp4">
			</video>
	</body>

Answer 1

由于您的视频处于定位状态：已修复，因此您可以使用负Z索引

#myVideo {z-index: -1;}

完整示例：

*{
  margin: 0;
  padding: 0;
}
.container{
  width: 90%;
  margin: 0 auto
}
.navbar {
  width:100%;
  overflow: hidden;
  height: 40px;
  line-height: 40px;
  background: #fff;
  border-bottom: 2px solid black;
}
.logo{
  width: 80px;
  float:left;
}

/* this is for ul tag */
.menu{
  float:right;
}
.menu li{
  float:left;
  width:120px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  list-style: none;
}
.menu li a{
  color: #000;
  text-decoration: none;
  font-family: calibri;
  text-transform: uppercase;
  display:block;
}
.menu li:hover{
  background: #dc3545
}
.menu li a:hover{
  color: #fff
}
#myVideo {
  position: fixed;
  z-index: -1;
  right: 0;
  bottom: 0;
  min-width: 100%; 
  min-height: 100%;
  filter: brightness(25%);
}

<div class="navbar">
  <div class="container">
    <div class="logo_div">
      <a href="https://www.google.com/"><img src="C:\Users\paulk\Desktop\Web Dev\TheGuide.png" alt="" class="logo"></a>
    </div>
    <div class="navbar_links">
      <ul class="menu">
        <li><a href="#">Home</a></li>
        <li><a href="#">Page 1</a></li>
        <li><a href="#">Page 2</a></li>
        <li><a href="#">About us</a></li>
      </ul>
    </div>
  </div>
</div>
<video playsinline autoplay muted loop poster="TheGuide.jpg" id="myVideo">
  <source src="https://ak8.picdn.net/shutterstock/videos/8733538/preview/stock-footage-sydney-australia-january-social-media-internet-platform-networks-social-media-allows.webm" type="video/mp4">
</video>

如何在导航背景上覆盖导航栏

1 个答案: