我在背景中放置了一个图像，但它没有出现在我身上。我用bootstrap 5。我该如何解决这个问题?我试了很多方法，但没有一种像我预期的那样有效。
html {
background: url(https://via.placeholder.com/150/0000FF/808080) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" type="text/css" href="estilo.css">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- displays site properly based on user's device -->
<link rel="icon" type="image/png" sizes="32x32" href="./images/favicon-32x32.png">
<title>Frontend Mentor | Base Apparel coming soon page</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
</head>
<body>
<div class="row">
<div class="col-sm-6"><img src="https://via.placeholder.com/150/FF0000/808080" class="img-fluid"></div>
<div class="col-sm-6">50%</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>
</body>
</html>您可以使用<body>标记:
body {
background: url(https://via.placeholder.com/150/0000FF/808080) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
否则，背景图像将显示在您的内容之后。
参见工作示例。
尝试将您的背景图像放在<body>标签中，而不是在<html>标签中，因此
body {
background: url(./images/bg-pattern-desktop.svg) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}