Bootstrap 4. Smooth scrolling working on .nav-link but not on other anchor elements
Set scroll-behavior in css and it will do the effect.
html {
scroll-behavior: smooth;
}
Here's a link to the example: https://jsfiddle.net/mzjan/set7aLnp/
Its working fine with bootstrap 4 and this code also working fine may be something wrong in your other code.
$('.test, .nav-link, .navbar-brand, .new-button').click(function() {
var sectionTo = $(this).attr('href');
$('html, body').animate({
scrollTop: $(sectionTo).offset().top
}, 1500);
}); <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<a href="#one" class="test">test class</a><br>
<a href="#two" class="navbar-brand">navbar-brand class</a>
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<div id="one">test class</div>
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<div id="two">navbar-brand class</div>
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