HTML 类

HTML 布局


对 HTML 进行分类(设置类),使我们能够为元素的类定义 CSS 样式。

为相同的类设置相同的样式,或者为不同的类设置不同的样式。

实例

<!DOCTYPE html>
<html>
<head>
<style>
.cities {
    background-color:black;
    color:white;
    margin:20px;
    padding:20px;
} 
</style>
</head>

<body>

<div class="cities">
<h2>London</h2>
<p>
London is the capital city of England. 
It is the most populous city in the United Kingdom, 
with a metropolitan area of over 13 million inhabitants.
</p>
</div> 

</body>
</html>

分类块级元素

HTML <div> 元素是块级元素。它能够用作其他 HTML 元素的容器。

设置 <div> 元素的类,使我们能够为相同的 <div> 元素设置相同的类:

实例

<!DOCTYPE html>
<html>
<head>
<style>
.cities {
    background-color:black;
    color:white;
    margin:20px;
    padding:20px;
} 
</style>
</head>

<body>

<div class="cities">
<h2>London</h2>
<p>London is the capital city of England. 
It is the most populous city in the United Kingdom, 
with a metropolitan area of over 13 million inhabitants.</p>
</div>

<div class="cities">
<h2>Paris</h2>
<p>Paris is the capital and most populous city of France.</p>
</div>

<div class="cities">
<h2>Tokyo</h2>
<p>Tokyo is the capital of Japan, the center of the Greater Tokyo Area,
and the most populous metropolitan area in the world.</p>
</div>

</body>
</html>

分类行内元素

HTML <span> 元素是行内元素,能够用作文本的容器。

设置 <span> 元素的类,能够为相同的 <span> 元素设置相同的样式。

实例

<!DOCTYPE html>
<html>
<head>
<style>
  span.red {color:red;}
</style>
</head>
<body>

<h1>My <span class="red">Important</span> Heading</h1>

</body>
</html>



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