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CSS positioning between sibling elements
* Note:
* 1. The css native selector is the fastest to find elements
* 2. The custom selector starts with:, which is very similar to the pseudo-class in CSS
* 3. The custom selector is positioned based on the position found using the native selector
* 4. Use native selectors as much as possible to get elements
1.:nth-child(n): css is calculated from 1
$('ul :nth-child(2)').css('color', 'red')
2.:nth-child(2n): Select all even-numbered elements (n=[1,2,3,...])
$('ul :nth-child(2n)').css('color', 'red')
3.:nth-child(2n 1): Select all odd-numbered elements (n=[0 ,1,2,...])
$('ul :nth-child(2n+1)').css('color', 'red')
4.:nth-child(even): Get the even-numbered position element; nth-child(odd): Get the odd-numbered position element
$('ul :nth-child(even)').css('color', 'red') //偶数行为红色文本 $('ul :nth-child(odd)').css('color', 'green') //奇数行为绿色文本
5.:nth-last-child(): Calculate the position in reverse order
$('ul :nth-last-child(2)').css('color', 'red') //倒数第2个,即第9位 $('ul :nth-last-child(even)').css('color', 'red') //倒序开始选择偶数位置
6.:first-child: The first child element of the parent element
$('ul :first-child').css('color', 'red')
7.:last-child: The last child element of the parent element
$('ul :last-child').css('color', 'red')
8.:only-child: The only child element of the parent element
$('ul :only-child').css('color', 'red')
9.nth -of-type(), similar to nth-child(), only returns elements of the same type
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>在同级元素之间定位</title> </head> <body> <!-- <ul> <li>php中文网(m.sbmmt.com)</li> </ul> --> <ul> <li>列表项01</li> <li>列表项02</li> <li>列表项03</li> <li>列表项04</li> <li>列表项05</li> <li>列表项06</li> <li>列表项07</li> <li>列表项08</li> <li>列表项09</li> <li>列表项10</li> </ul> <button>运行</button> </body> </html>
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