jQuery+swiper component realizes the timeline sliding year tab switching effect

<div class="swiper-container box">
    <div class="swiper-wrapper main-timeline">
      <div class="swiper-slide timeline fd-active-line">
        <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="timeline-content">
          <div class="timeline-year">
            <span>2019</span>
          </div>
        </a>
        <div class="xians"></div>
      </div>
      <div class="swiper-slide timeline">
        <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="timeline-content">
          <div class="timeline-year">
            <span>2018</span>
          </div>
        </a>
        <div class="xians"></div>
      </div>
      <div class="swiper-slide timeline">
        <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="timeline-content">
          <div class="timeline-year">
            <span>2017</span>
          </div>
        </a>
        <div class="xians"></div>
      </div>
      <div class="swiper-slide timeline">
        <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="timeline-content">
          <div class="timeline-year">
            <span>2016</span>
          </div>
        </a>
        <div class="xians"></div>
      </div>
      <div class="swiper-slide timeline">
        <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="timeline-content">
          <div class="timeline-year">
            <span>2015</span>
          </div>
        </a>
        <div class="xians"></div>
      </div>
      <div class="swiper-slide timeline">
        <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="timeline-content">
          <div class="timeline-year">
            <span>2014</span>
          </div>
        </a>
        <div class="xians"></div>
      </div>
    </div>
  </div>
  <ul class="event_list">
    <div>
      <h3 id="2012">2019</h3>
      <img src="./img/lh.jpg" alt="">
    </div>
    <div style="display: none;">
      <h3 id="2012">2018</h3>
      <img src="./img/lhls.jpg" alt="">
    </div>
    <div style="display: none;">
      <h3 id="2011">2017</h3>
      <img src="./img/lkss.jpg" alt="">
    </div>
    <div style="display: none;">
      <h3 id="2011">2016</h3>
      <img src="./img/luhu.jpg" alt="">
    </div>
    <div style="display: none;">
      <h3 id="2011">2015</h3>
      <img src="./img/luhuwhite.jpg" alt="">
    </div>
    <div style="display: none;">
      <h3 id="2011">2014</h3>
      <img src="./img/lhls.jpg" alt="">
    </div>
  </ul>
  </div>

<script src="js/jquery.min_v1.0.js" type="text/javascript"></script>
  <script src="js/swiper-bundle.min.js" type="text/javascript"></script>
  <link rel="stylesheet" href="css/swiper-bundle.min.css" rel="external nofollow" >

.page {
  width: 100%;
}
 
.main-timeline {
  font-family: 'Roboto', sans-serif;
  width: 200px;
  position: relative;
  float: left;
}
 
.main-timeline:after {
  content: '';
  display: block;
  clear: both;
}
 
.main-timeline:before {
  /* content: '';
  height: calc(100% + 80px);
  width: 0px;
  border: 2px solid #0870C5;
  transform: translateX(-50%);
  position: absolute;
  left: 114px;
  top: 0px; */
}
 
.main-timeline .timeline {
  width: 4%;
  /* padding: 140px 70px 0 25px; */
  margin: 0 50px 0 0;
  float: left;
  position: relative;
}
 
.main-timeline .timeline-content {
  /* padding: 15px 15px 15px 40px;
  border: 2px solid #00A79B; */
  border-radius: 15px 0 15px 15px;
  display: block;
  position: relative;
}
 
.main-timeline .timeline-content:hover {
  text-decoration: none;
}
 
.fd-active-line .timeline-content:after {
  content: '';
  background-color: #00A79B;
  height: 18px;
  width: 15px;
  position: absolute;
  right: -43px;
  top: 27px;
  /* clip-path: polygon(100% 0, 0 0, 0 100%); */
}
 
.main-timeline .timeline-year {
  color: #fff;
  background-color: #00A79B;
  font-size: 24px;
  font-weight: 900;
  text-align: center;
  line-height: 80px;
  height: 80px;
  width: 80px;
  border-radius: 50%;
  position: absolute;
  right: -120px;
  top: -40px;
}
 
.main-timeline .timeline-year:after {
  content: '';
  height: 100px;
  width: 100px;
  border: 8px solid #00A79B;
  border-left-color: transparent;
  border-radius: 50%;
  transform: translateX(-50%) translateY(-50%) rotate(-20deg);
  position: absolute;
  left: 50%;
  top: 50%;
}
 
.main-timeline .timeline-icon {
  color: #fff;
  background-color: #00A79B;
  font-size: 35px;
  text-align: center;
  line-height: 50px;
  height: 50px;
  width: 50px;
  border-radius: 50%;
  transform: translateY(-50%);
  position: absolute;
  top: 50%;
  left: -25px;
  transition: all 0.3s;
}
 
.main-timeline .title {
  color: #222;
  font-size: 20px;
  font-weight: 900;
  text-transform:uppercase;
  letter-spacing: 1px;
  margin: 0 0 7px 0;
}
 
.main-timeline .description {
  color: #222;
  font-size: 15px;
  letter-spacing: 1px;
  text-align: justify;
  margin: 0 0 5px;
}
 
.main-timeline .timeline:nth-child(even) .timeline-content {}
 
.main-timeline .timeline:nth-child(even) .timeline-content:after {
  transform: rotateY(180deg);
  right: auto;
  left: 123px;
}
 
.main-timeline .timeline:nth-child(even) .timeline-year:after {
  transform: translateX(-50%) translateY(-50%) rotate(200deg);
}
 
.main-timeline .timeline:nth-child(even) .timeline-icon {
  left: auto;
  right: -25px;
}
 
.timeline:nth-child(4n+2) .timeline-content,
.timeline:nth-child(4n+2) .timeline-year:after {
  border-color: #9E005D;
}
 
.timeline:nth-child(4n+2) .timeline-year:after {
  border-left-color: transparent;
}
 
.timeline:nth-child(4n+2) .timeline-content:after,
.timeline:nth-child(4n+2) .timeline-icon,
.timeline:nth-child(4n+2) .timeline-year {
  background-color: #9E005D;
}
 
.timeline:nth-child(4n+3) .timeline-content,
.timeline:nth-child(4n+3) .timeline-year:after {
  border-color: #f24f0e;
}
 
.timeline:nth-child(4n+3) .timeline-year:after {
  border-left-color: transparent;
}
 
.timeline:nth-child(4n+3) .timeline-content:after,
.timeline:nth-child(4n+3) .timeline-icon,
.timeline:nth-child(4n+3) .timeline-year {
  background-color: #f24f0e;
}
 
.timeline:nth-child(4n+4) .timeline-content,
.timeline:nth-child(4n+4) .timeline-year:after {
  border-color: #0870C5;
}
 
.timeline:nth-child(4n+4) .timeline-year:after {
  border-left-color: transparent;
}
 
.timeline:nth-child(4n+4) .timeline-content:after,
.timeline:nth-child(4n+4) .timeline-icon,
.timeline:nth-child(4n+4) .timeline-year {
  background-color: #0870C5;
}
 
@media screen and (max-width:767px) {
  .main-timeline:before {
    display: none;
  }
 
  .main-timeline .timeline {
    width: 100%;
    padding-top: 80px;
    padding-right: 12px;
    margin-bottom: 20px;
  }
 
  .main-timeline .timeline:nth-child(even) {
    padding-left: 10px;
    padding-top: 80px;
    margin-bottom: 20px;
  }
 
  .main-timeline .timeline-content,
  .main-timeline .main-timeline .timeline:nth-child(even) .timeline-content {
    background-color: #fff;
    padding-top: 25px;
  }
 
  .main-timeline .timeline-content:after {
    display: none;
  }
 
  .main-timeline .timeline-year {
    font-size: 24px;
    line-height: 70px;
    height: 70px;
    width: 70px;
    right: 0;
    top: -65px;
  }
 
  .main-timeline .timeline-year:after {
    display: none;
  }
 
  .main-timeline .timeline:nth-child(even) .timeline-year {
    left: 3px;
  }
}
 
@media screen and (max-width:567px) {
  .main-timeline .title {
    font-size: 18px;
  }
}
 
.swiper-container {
  width: 205px;
  height: 500px;
  float: left;
}
 
.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
 
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
}
 
@media (max-width: 760px) {
  .swiper-button-next {
    right: 20px;
    transform: rotate(90deg);
  }
 
  .swiper-button-prev {
    left: 20px;
    transform: rotate(90deg);
  }
}
.event_list img {
  width: 880px;
  height: 470px;
  object-fit: cover;
}
.xians {
  width: 3px;
  height: 100%;
  background: #0870C5;
  position: absolute;
  left: 82px;
  z-index: -1;
}

 <script>
    $(function () {
      $(".main-timeline .timeline").click(function () {
        var TAG = $(this).siblings().length;
        if (TAG >= 1) {
          var index = $(this).index()
          $(this).addClass('fd-active-line').siblings().removeClass('fd-active-line')
          $(this).parent().parent().siblings('.event_list').children().eq(index).show().siblings().hide()
        }
      })
      var swiper = new Swiper('.swiper-container', {
        slidesPerView: 4,
        direction: 'vertical',
        navigation:
          nextEl: '.swiper-button-next',
          prevEl: '.swiper-button-prev',
        },
        on: {
          resize: function () {
            swiper.changeDirection(getDirection());
          }
        }
      });
    });
  </script>