Toggle是切换的意思,所以 toggle button意思是切换按钮。toggle menu也称为切换菜单。也成为收展式二级菜单。
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
位置:
<nav class="navbar navbar-expand-lg navbar-dark bg-dark fixed-top">
<!-- toggle menu -->
<nva>