Toggles (adds or removes) a CSS class from a component.
Signature
toggleClass(Object element, String className)
Parameters
element: Type: Object. The component to add or remove the class from.
className: Type: String. The CSS class to be added or removed.
Sample Code
// find a component with aura:id="toggleMe" in markup
var toggleText = component.find("toggleMe");
$A.util.toggleClass(toggleText, "toggle");