JQuery Method for operating the nth element of the same group element

JQuery Method for operating the nth element of the same group element

Jquery operates on the nth element of the same group element. Example:

There are 3 ul under class = "phpernote", and now you want to add class = "com" to the 5th li elements under each ul"

Specific jQuery code:

$ (". Phpernote ul li: nth-child (5)"). addClass ("com ");

You have successfully added the class com to the 5th li in each ul.

Of course, you can also directly add the CSS code:

$ (". Phpernote ul li: nth-child (5)" ).css ({"padding-right": "5px "});

Nth-child: the abbreviation in English, n-th, which indicates the nth number, 1, 2, and 3 respectively. They use the first, second, and third words respectively, and start from 4 as the number word + th, such as 4th, 5th, and 6th

Obtain the first li in ul.

$ ("Ul li: first-child ")

Obtain the last li in ul.

$ ("Ul li: last-child ")

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