CSS grouping and nested selectors
CSS Grouped and Nested Selectors
##Grouped Selectors
There are many elements with the same style in the style sheet,In order to minimize the code, you can use grouping selectors. Separate each selector with a comma.
Example
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style>
h1,h2,p
{
color:green;
}
</style>
</head>
<body>
<h1> PHP中文网你</h1>
<h2>php.cn</h2>
<p>学习PHP知识的好选择.</p>
</body>
</html>Run the program and try it
Nested selectors
It may apply to the styling of selectors inside selectors . In the following example, three styles are set: Specify a style for all p elements, specify a style for all class="marked" elements, and specify a style for all class="marked" elements. The p element specifies a style <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style>
p
{
color:blue;
text-align:center;
}
.marked
{
background-color:red;
}
.marked p
{
color:white;
}
</style>
</head>
<body>
<p>褪尽风华，我依然在彼岸守护你</p>
<div class="marked">
<p>那些繁华哀伤终成过往，</p>
</div>
<p>请不要失望，平凡是为了最美的荡气回肠。</p>
</body>
</html>Run the program to try it
##
new file
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style>
h1,h2,p
{
color: #d4d223;
}
</style>
</head>
<body>
<h1>PHP中文网</h1>
<h2>php.cn</h2>
<p>你学习PHP知识的好选择.</p>
</body>
</html>
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