Set class

Set class toggles a class based on a condition.

If the condition evaluates to true, the specified class is added to the target element.

If the condition evaluates to false, the class won't be added, or if the element contains the class, it will be removed.

In the example on the image above, we're checking whether the r.get_user request is currently being executed. If it is, we're adding the is-loading class to the target element.

For more info, check this article on truthy and falsy values.