DraggleLayout.less

.root {
    position: relative;
    display: flex;
    margin: 24px auto;
    .left {
      height: 100%;
      position: relative;
      .handler {
        position: absolute;
        right: 0;
        bottom: 0;
        width: auto;
        height: 100%;
  
        user-select: none;
        color: #fff;
        text-align: center;
        cursor: ew-resize;
        display: flex;
        flex-direction: column;
        justify-content: center;
      }
    }
    .right {
      height: 100%;
    }
  }