Taro css

小红点

&::before {
                content: "";
                display: block;
                width: 12px;
                height: 12px;
                background: red;
                border-radius: 50%;
                margin-right: 8px;
              }

打钩/箭头

 &::after {
            content: "";
            width: 10px;
            height: 40px;
            position: absolute;
            right: 0;
            top: -40px;
            border: 18px solid red;
            border-top-color: transparent;
            border-left-color: transparent;
            transform: rotate(45deg);
          }

classname包含多个

//固定
className = 'abc  ddd'

//动态
className = {`abc  ${index==0 ? 'ddd' : 'aaa'}`}