效果图：

1.创建一个div

 <div class="point1" @click="handlePoint(1)"></div>

2.设置样式

  .point1{
    width: 1rem;
    height: 1rem;
    background: #2ce92f;
    position: absolute;
    border-radius: 50%;
    z-index: 999;
    cursor: pointer;
  }

3.设置伪元素样式

  .point1::after {
    width: 100%;
    height: 100%;
    content: "";
    border-radius: 50%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -2;
    background-color: #2ce92f;
    animation: dot-play 4s linear 400ms infinite;
  }
  .point1::before {
    width: 100%;
    height: 100%;
    content: "";
    border-radius: 50%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    background-color: #2ce92f;
    animation: dot-play 4s linear 200ms infinite;
    animation-delay: 2s; /* 延迟 2s */
  }

4.设置动画效果

  @keyframes dot-play {
    from {
      transform: scale(1);
      opacity: 0.8;
    }
    to {
      transform: scale(4);
      opacity: 0.1;
    }
  }