How to add or remove CSS classes using jQuery?

In this tutorial you will learn how to add or remove CSS classes using jQuery. jQuery provides several methods, such as addClass (), removeClass (), toggleClass (), etc. to manipulate the CSS classes assigned to HTML elements. The jQuery addClass () method adds one or more classes to the selected elements.

How does addClass() work in jQuery?

It simply adds the class, appending it to any which may already be assigned to the elements. Before jQuery version 1.12/2.2, the .addClass () method manipulated the className property of the selected elements, not the class attribute. Once the property was changed, it was the browser that updated the attribute accordingly.

How do I add a class to a selected element in jQuery?

This method toggles between adding/removing classes from the selected elements: The jQuery css () method will be explained in the next chapter. Use a jQuery method to add the "important" class to a element. $ ("p"). (" "); For a complete overview of all jQuery CSS methods, please go to our jQuery HTML/CSS Reference.

Can I update a CSS class with jQuery?

You cannot directly update the CSS classes in a separate css file with jQuery. You could however create a tag and add/overwrite a CSS class: When updating a CSS class, you'll need to take care the cascading order. Otherwise, it may not turn out to be the effect you are after.