https://github.com/istvan-ujjmeszaros/bootstrap-dropdown-hover/releases

https://www.virtuosoft.eu/code/bootstrap-dropdown-hover/

https://github.com/search?o=desc&q=bootstrap+hover

<script src="dist/jquery.bootstrap-dropdown-hover.min.js"></script>

<script>
    $.fn.bootstrapDropdownHover();
</script>

<div>
     <button type="button" class="btn btn-outline-success dropdown-toggle" data-toggle="dropdown" href="#">查看更多</button>
     <ul class="dropdown-menu">
                            <li class="dropdown-item"><a href="#">Bootstrap Dropdown Hover</a></li>
                            <li class="dropdown-item"><a href="#">Bootstrap Auto-Hiding Navbar</a></li>
                            <li class="dropdown-item"><a href="#">Bootstrap Color Picker Sliders</a></li>
                            <li class="dropdown-item"><a href="#">Bootstrap TouchSpin</a></li>
                            <li class="dropdown-item"><a href="#">jQuery Color Picker Sliders</a></li>
                            <li class="dropdown-item"><a href="#">Bootstrap Duallistbox</a></li>
     </ul>
</div>

Initiate on all dropdowns/dropups method 1
$.fn.bootstrapDropdownHover({
  // see next for specifications
});
Initiate on all dropdowns/dropups method 1
$('[data-toggle="dropdown"]').bootstrapDropdownHover({
  // see next for specifications
});
Initiate on navbar menu only
$('.navbar [data-toggle="dropdown"]').bootstrapDropdownHover({
  // see next for specifications
});