网络协议三要素是什么

滚动条样式

  .d1 {
    height: 200px;
    width: 300px;
    overflow-y: scroll;
    border: 1px solid #ccc;
  }

  .d1 > div {
    text-align: center;
  }

  ::-webkit-scrollbar-track {
    background: pink !important;
  }

  ::-webkit-scrollbar-thumb {
    background: linear-gradient(orange, red) !important;
    border-radius: 10px !important;
  }

  ::-webkit-scrollbar {
    width: 10px;
    height: 10px;
  }