Good Afternoon people, next, I put a navbar in my project on the mobile part of the stick, I click on the bars the menu appears and then it disappears, alone, has someone already gone through it? follow my project link
If someone can help me, I appreciate it!
No code will not help you much.
But your error is in this tag
<div class="navbar-collapse header celm collapse in" id="bs-example-navbar-collapse-1" style="z-index: 9999;" aria-expanded="true">
Notice that even when it is open .in the class .collapse remains in the element and causes it to disappear. If you take out .collapse when it has .in it will work.
.collapsethenavgetsadisplay:none!important 