这可能是一个非常基本的问题,但我刚开始学习代码并完成Codecademy上的HTML和CSS跟踪。对不起,CSS就在最重要的位置。
.nav a {
color: #5a5a5a;
font-size: 11px;
font-weight: bold;
padding: 14px 10px;
text-transform: uppercase;
}
.jumbotron {
background-image:url('http://goo.gl/04j7Nn');
height: 500px;
}
.jumbotron h1 {
color: #fff;
font-size: 48px;
font-family: 'Shift', sans-serif;
font-weight: bold;
}
.jumbotron p {
font-size: 20px;
color: #fff;
}
.learn-more {
background-color: #f7f7f7;
}
.learn-more h3 {
font-family: 'Shift', sans-serif;
font-size: 18px;
font-weight: bold;
}
.learn-more a {
color: #00b0ff;
}

<!DOCTYPE html>
<html>
<head>
<link href="http://s3.amazonaws.com/codecademy-content/courses/ltp/css/shift.css" rel="stylesheet">
<link rel="stylesheet" href="main.css">
</head>
<body>
<div class="nav">
<div class="container">
<ul>
<li><a href="#">Airbnb logo</a></li>
<li><a href="#">Browse</a></li>
</ul>
<ul>
<li><a href="#">Sign Up</a></li>
<li><a href="#">Log In</a></li>
<li><a href="#">Help</a></li>
</ul>
</div>
</div>
<div class="jumbotron">
<div class="container">
<h1>Find a place to stay.</h1>
<p>Rent from people in over 34,000 cities and 192 countries.</p>
</div>
</div>
<div class="learn-more">
<div>
<div>
<div>
<h3>Travel</h3>
<p>From apartments and rooms to treehouses and boats: stay in unique spaces in 192 countries.</p>
<p><a href="#">See how to travel on Airbnb</a></p>
</div>
<div>
<h3>Host</h3>
<p>Renting out your unused space could pay your bills or fund your next vacation.</p>
<p><a href="#">Learn more about hosting</a></p>
</div>
<div>
<h3>Trust and Safety</h3>
<p>From Verified ID to our worldwide customer support team, we've got your back.</p>
<p><a href="#">Learn about trust at Airbnb</a></p>
</div>
</div>
</div>
</div>
</body>
</html>
&#13;
这是来自Codecademy的网站跟踪。之前我曾问过为什么每个类需要有这么多div来编辑CSS。我的问题是:为什么Codecademy在他们的例子中放了这么多div,比如div类&#34;了解更多&#34;?我删除了额外的div,看到构建的网页没有任何变化。也许有定位或我没看到的东西?
答案 0 :(得分:1)
首先要理解的是HTML只是一种标记语言。因此,除了header, body, ul, figure
等语法和一些复杂元素之外,div标签没有特殊功能。我建议你使用前端游乐场(比如codepen)并检查HTML的运行方式。额外的div可能对CSS或Javascript目的有用:
继续学习HTML的一些有用链接:
<强> HTML5doctor 强> http://html5doctor.com/
MDN Mozilla参考 https://developer.mozilla.org/en-US/
Codepen (前端游乐场): http://codepen.io/