jQuery。游泳运动员。js分页不工作,如何设置?

滑块工作,但分页不可见

HTML:

<div class="swiper-container">
    <div class="swiper-wrapper">
      <div class="swiper-slide">
        <img class="swiper-img" src="/assets/img.png" />
      </div>
      <div class="swiper-slide">
        <img class="swiper-img" src="/assets/img.png" />
      </div>
      <div class="swiper-slide">
        <img class="swiper-img" src="/assets/img.png" />
      </div>
      <div class="swiper-slide">
        <img class="swiper-img" src="/assets/img.png" />
      </div>
    </div>
    <div class="swiper-pagination"></div>

JS:

$(document).ready(() => {
  var swiper = new Swiper(".swiper-container", {
        pagination: {
          el: ".swiper-pagination",
          clickable: true,
          renderBullet: function (index, className) {
            return '<span class="' + className + '">' + "</span>";
          },
        },
      });
    })

脚本已连接,滑块工作。但我们看到根本没有分页,这与样式无关