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Jquery how to judge whether there is a class, in view of this question, this article introduces the corresponding analysis and answer in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

In jquery, you can use the hasClass () method to determine whether there is a class, which checks whether the selected element contains the specified class, with the syntax "$(selector) .hasClass (classname)".

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

In jquery, you can use the hasClass () method to determine whether there is a specified class.

The hasClass () method checks whether the selected element contains the specified class. If the selected element contains the specified class, the method returns "true".

Syntax format:

$(selector) .hasClass (classname)

Classname: a required parameter that specifies the class to look for in the specified element.

Example: check

Whether the element contains the "intro" class:

$(document) .ready (function () {$("button") .click (function () {alert ($("p"). HasClass ("intro"));});}); .intro {font-size:120%; color:red;} this is a paragraph heading and this is a paragraph

This is another paragraph.

Does any p element use the "intro" class?

This is the end of the answer on how jquery judges whether there is a class question. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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