_widthBreakpoint(){
  
        if( window.innerWidth <= this.options.minWidth ){
          this._breakpoint = true;
          this.affixedType = 'STATIC';
  
          this.sidebar.removeAttribute('style');
          StickySidebar.removeClass(this.sidebar, this.options.stickyClass);
          this.sidebarInner.removeAttribute('style');
        } else {
          this._breakpoint = false;
        }
      }
Breakdown sticky sidebar when window width is below `options.minWidth` value.
@protected