HTML 類

對 HTML 進行分類(設置類),使我們能夠為元素的類定義 CSS 樣式。

為相同的類設置相同的樣式,或者為不同的類設置不同的樣式。

實例

<!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>

親自試一試

分類塊級元素

HTML <div> 元素是塊級元素。它能夠用作其他 HTML 元素的容器。

設置 <div> 元素的類,使我們能夠為相同的 <div> 元素設置相同的類:

實例

<!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>

親自試一試

分類行內元素

HTML <span> 元素是行內元素,能夠用作文本的容器。

設置 <span> 元素的類,能夠為相同的 <span> 元素設置相同的樣式。

實例

<!DOCTYPE html>
<html>
<head>
<style>
  span.red {color:red;}
</style>
</head>
<body>
<h1>My <span class="red">Important</span> Heading</h1>
</body>
</html>

親自試一試