shopxo/service/Application/Home/View/Default/Public/NavBar.html

<button class="am-topbar-btn am-topbar-toggle am-btn am-btn-sm am-btn-success am-show-sm-only" data-am-collapse="{target: '#doc-topbar-collapse'}"><span class="am-sr-only">{{:L('nav_switch_text')}}</span> <span class="am-icon-bars"></span></button>