JQuery instructions on use of pseudo-class selector _ jquery

The powerful jQuery selector not only supports the basic css selector, but also supports many CSS pseudo-class selector, you can even customize the selector. The powerful jQuery selector not only supports the basic css selector, but also supports many CSS pseudo-class selector and even custom selector, next let's take a look at some pseudo-class selector

: Nth-child usage
Nth-child is a css3 pseudo-class selector, which is implemented in jQuery. The definition of nth-child in Jquery API is: "matches the nth child or parity element under the parent element". Reading is a bit difficult. Let's explain it through examples below:

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