Bootstrap 4 carousel幻灯片没有动画

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/js/bootstrap.min.js"></script>

<div id="carouselExample" class="carousel slide" data-ride="carousel">
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="image1.jpg" class="d-block w-100" alt="Image 1">
    </div>
    <div class="carousel-item">
      <img src="image2.jpg" class="d-block w-100" alt="Image 2">
    </div>
    <div class="carousel-item">
      <img src="image3.jpg" class="d-block w-100" alt="Image 3">
    </div>
  </div>
</div>

$(document).ready(function(){
  $('.carousel').carousel();
});