React styled-components设置组件属性的方法

import React from 'react';
import styled from 'styled-components';

// 设置样式
const ContentDiv = styled.div`
  display: flex;
  justify-content: space-between;
  height: 50px;
  line-height: 50px;
  transition: 0.5s;
  cursor: pointer;
  &:hover{
    color: #31c27c;
  }
`;

const LengthDiv = styled.div`
  color: #999;
`;

// list组件
class List extends React.Component {
  constructor(props){
   super(props);
   this.state = {
    // 播放列表
    list: this.props.list
   };
  }

  render(){
    const listItem = this.state.list.map((item, index) => {
      return (
        <ContentDiv key={ item.name } poster={ item.poster } audio={ item.music }>
          <div>
            { item.name } - { item.author }
          </div>
          <LengthDiv>
            { item.length }
          </LengthDiv>
        </ContentDiv>
      );
    });

    return (
      <div>
        { listItem }
      </div>
    )
  }
}

export default List;

const ContentDiv = styled.div.attrs({
 poster: props => props.poster,
 audio: props => props.audio
})`
  display: flex;
  justify-content: space-between;
  height: 50px;
  line-height: 50px;
  transition: 0.5s;
  cursor: pointer;
  &:hover{
    color: #31c27c;
  }
`;