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

Continuing Learning

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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CSS grouping and nested selectors

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