css3 clever use of structural pseudo-class selectors-HTML Tutorial-php.cn

I recently saw a usage of structural pseudo-class selector on a foreign website. I thought it was very practical, so I tried it myself and recorded it:

This is the most basic style:

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Contents in body:

 1 <body>  2 <ul>  3 <li>第01个li>  4 <li>第02个li>  5 <li>第03个li>  6 <li>第04个li>  7 <li>第05个li>  8 <li>第06个li>  9 <li>第07个li> 10 <li>第08个li> 11 <li>第09个li> 12 <li>第10个li> 13 <li>第11个li> 14 ul> 15 body>

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First is the usage of the most basic structural pseudo-class selector:

1  li:nth-child(8){ 2  background-color: #298EB2; 4 }

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The results are displayed as:

Use:nth-child(n+6) which is equivalent to:nth-child(6) and above li tag elements:

1  li:nth-child(n+6){ 2  background-color: #298EB2; 4 }

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The results are displayed as:

Similarly, use:nth-child(-n+6) which is equivalent to:nth-child(6) and the following li tag elements:

1  li:nth-child(-n+6){ 2  background-color: #298EB2; 4 }

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The results are displayed as:

Based on the above principles we can come up with some advanced ones:

For example, you can use nth-child(n+4):nth-child(-n+8) to obtain the li tag elements of :nth-child(4) and above and :nth-child(8) and below:

1  li:nth-child(n+4):nth-child(-n+8){ 2  background-color: #298EB2; 3 }

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The results are displayed as:

You can also use:nth-child(n+2):nth-child(odd):nth-child(-n+8) to get:nth-child(n+2) to:nth-child(-n+8 ) between singular li tag elements:

1  li:nth-child(n+2):nth-child(odd):nth-child(-n+8){ 2  background-color: #298EB2; 3 }

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The results are displayed as:

Finally, we can also use:nth-child(3n+1) to get even li tag elements with numbers 1, 4, 7, and 10:

1  li:nth-child(3n+1):nth-child(even){ 2  background-color: #298EB2; 3 }

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The results are displayed as:

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css3 clever use of structural pseudo-class selectors