HTML 类
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>