vendor/uui/js/u-ui.js
function () {
        if (u.hasClass(this._header, this._CssClasses.IS_COMPACT)) {
            u.removeClass(this._header, this._CssClasses.IS_COMPACT);
            u.addClass(this._header, this._CssClasses.IS_ANIMATING);
        }
    }
function () {
        if (u.hasClass(this._header, this._CssClasses.IS_COMPACT)) {
            u.removeClass(this._header, this._CssClasses.IS_COMPACT);
            u.addClass(this._header, this._CssClasses.IS_ANIMATING);
        }
    }
function ( ) { if ( u . hasClass ( this . _header , this . _CssClasses . IS_COMPACT ) ) { u . removeClass ( this . _header , this . _CssClasses . IS_COMPACT ) ; u . addClass ( this . _header , this . _CssClasses . IS_ANIMATING ) ; } }
Handles expanding the header on click

@private
Handles expanding the header on click