How to Use jQuery's end () method _ jquery

This article will share with you the definition, usage, and examples of end () in jQuery. It is very simple and practical. If you need it, you can refer to it. End () method definition and usage:

The end () method can return to the last "destructive" operation to change the list of matched elements to the previous state.
If no destructive operation is performed, an empty set is returned.
Destructive operation: any operation that changes the matching element. This concept may be vague. For example:

$("li").css("color","red");

The CSS function of the above code is not a destructive operation, because the Matching Element list does not change, and the CSS attribute of the text content in the element is changed.

$("li").find(".first")

The above code is a destructive operation because the list of matching elements has changed. For example, if there are three li elements, the list of matching elements has three elements, but the find () after filtering by method, the matching element list has only one element, which is a "destructive" operation.
Syntax structure:

$(selector).end()

Instance code:

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