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26
4
我有以下代码，我不确定为什么 bg-info 对整个 body 不起作用，因为我是 bootstrap 的新手。
<!--http://v4-alpha.getbootstrap.com/getting-started/introduction/-->
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Required meta tags always come first -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/css/bootstrap.min.css" integrity="sha384-y3tfxAZXuh4HwSYylfB+J125MxIs6mR5FOHamPBG064zB+AFeWH94NdvaCBm8qnd" crossorigin="anonymous">
</head>
<body class="bg-info">
<div class="container text-xs-center">
<h1 class="display-1">Fullstack Conference</h1>
<p class="lead">Coming soon!! A one day conference about all things Javascript!!</p>
</div>
<div class="col-lg-6 col-lg-offset-3">
<div class="input-group">
<input type="text" class="form-control" placeholder="Enter your Email for info...">
<span class="input-group-btn">
<button class="btn btn-secondary" type="button">Sign Up!</button>
</span>
</div>
</div>
</div>
<!-- jQuery first, then Bootstrap JS. -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/js/bootstrap.min.js" integrity="sha384-vZ2WRJMwsjRMW/8U7i6PWi6AlO1L79snBrmgiDpgIWJ82z8eA5lenwvxbMV1PAh7" crossorigin="anonymous"></script>
</body>
</html>
这是我看到的: 
注意:根据这个视频，它应该可以工作 https://teamtreehouse.com/library/bootstrap-4-basics/getting-to-know-bootstrap-4/enhancing-the-page
最佳答案
您正在使用 bootstrap(js) 的 alpha 4，请使用 bootstrap 3.x。
你还有一个额外的</div>在代码中。
这个有效:
<!--http://v4-alpha.getbootstrap.com/getting-started/introduction/-->
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Required meta tags always come first -->
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/css/bootstrap.min.css" integrity="sha384-y3tfxAZXuh4HwSYylfB+J125MxIs6mR5FOHamPBG064zB+AFeWH94NdvaCBm8qnd" crossorigin="anonymous" />
</head>
<body class="bg-info">
<div class="container text-xs-center">
<h1 class="display-1">Fullstack Conference</h1>
<p class="lead">Coming soon!! A one day conference about all things Javascript!!</p>
</div>
<div class="col-lg-6 col-lg-offset-3">
<div class="input-group">
<input type="text" class="form-control" placeholder="Enter your Email for info...">
<span class="input-group-btn">
<button class="btn btn-secondary" type="button">Sign Up!</button>
</span>
</div>
</div>
</body>
<!-- jQuery first, then Bootstrap JS. -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
</html>关于html - bg-info 不适用于 bootstrap 中的全身，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37739387/
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4
0
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