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In this article, the editor introduces in detail "what is the concept of prev in jquery", the content is detailed, the steps are clear, and the details are handled properly. I hope this article "what is the concept of prev in jquery" can help you solve your doubts.

In jquery, prev means to return the previous sibling element; this method is used to return the previous element that shared the same parent element, and the method returns only one element, traversing back along the previous sibling element of the DOM element, with the syntax "element object .prev (selector expression searching for the scope of the previous sibling element)".

The operating environment of this tutorial: windows10 system, jquery3.2.1 version, Dell G3 computer.

What is the meaning of prev in jquery

The prev () method returns the previous sibling of the selected element.

Sibling elements are elements that share the same parent element.

Note: this method returns only one element.

DOM tree: this method traverses backwards along the previous sibling of the DOM element.

Related methods:

PrevAll ()-returns all sibling elements before the selected element

PrevUntil ()-returns all sibling elements before each element between two given parameters

The syntax is:

$(selector) .prev (filter)

Filter is optional. Specifies a selector expression that narrows the search for the previous sibling element.

Examples are as follows:

123.siblings * {display: block;border: 2px solid lightgrey;color: lightgrey;padding: 5pxt margin: 15px;} $(document) .ready (function () {$("li.start"). Prev (). Css ({"color": "red", "border": "2px solid red"});}) Ul (parent node) li (sibling node) li (last sibling node of li node with class name "start") li (li node with class name "start") li (sibling node) li (sibling node)

Output result:

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