.classList.toggle()

boolean Element.classList.toggle(String class[, boolean force])

Tags:

Toggles a class of an element.

element.classList.toggle(c1);

Adds class c1 to element if it is not present, removes it if it is.

element.classList.toggle(c1, force);

If force is set to true, behaves as .classList.add, if force is set to false, behaves as .classList.remove.

Returns true if class c1 is now present, and false otherwise.