在Bootstrap 4.1中添加平滑滚动（同时使用scrollspy）？

Question

So what i'm trying to do over here is to use the bootstrap 4.1s scrollspy function in my navbar. I've managed to get that to work. However I would also like to add smooth scrolling to it. After searching over the whole internet I still haven't managed to fix it.

Here's the original code that i am working with (same as from bootstrap).

<nav id="navbar-example2" class="navbar navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <ul class="nav nav-pills">
    <li class="nav-item">
      <a class="nav-link" href="#fat">@fat</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#mdo">@mdo</a>
    </li>
    <li class="nav-item dropdown">
      <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
      <div class="dropdown-menu">
        <a class="dropdown-item" href="#one">one</a>
        <a class="dropdown-item" href="#two">two</a>
        <div role="separator" class="dropdown-divider"></div>
        <a class="dropdown-item" href="#three">three</a>
      </div>
    </li>
  </ul>
</nav>
<div data-spy="scroll" data-target="#navbar-example2" data-offset="0">
  <h4 id="fat">@fat</h4>
  <p>...</p>
  <h4 id="mdo">@mdo</h4>
  <p>...</p>
  <h4 id="one">one</h4>
  <p>...</p>
  <h4 id="two">two</h4>
  <p>...</p>
  <h4 id="three">three</h4>
  <p>...</p>
</div>

And here's what i've tried to add to enable smooth scrolling.

      <script>
          $(document).ready(function() {
    $(".nav-item").click(function() {
        var t = $(this).attr("href");
        $('.active').removeClass('active');
        $("html, body").animate({
            scrollTop: $(t).offset().top - 50
        }, {
            duration: 1e3,

        });

        $('body').scrollspy({ target: '#navbar-example2',offset: $(t).offset().top });
        $(this).parent().addClass('active');





        return false;
    });

});



//navbar
var distance = $('#site-header').offset().top,
    $window = $(window);

$window.scroll(function() {
    if ( $window.scrollTop() >= distance ) {
        $('#site-header').addClass('fixed-nav')
    }
    if ( $window.scrollTop() <= distance ) {
        $('#site-header').removeClass('fixed-nav')
    }
});


$('body').scrollspy({ target: '#navbar-example2',offset: 0 });
        </script>

As of now I feel stuck and I don't understand what it is i am doing wrong. Because I can't make it work. I've also tried adding different variations of css:s but I can't make it work. Any help would be appriciated.

Answer 1

Change the jQuery selector for the click handler to...

$(".nav-link,.dropdown-item").click(function() {
  ...
});

https://www.codeply.com/go/y0LweX2FBY

The problem with the nav-link selector is that it doesn't have an href so the click handler isn't doing anything. Also, you probably want the Navbar fixed-top so that it doesn't scroll away when navigating to a section.