react 使用map 的時候提示 沒有返回值

 

由於map 的函數體裏 用了if判斷，在if塊以外return 一個值就能夠了

 <div className="service-entry">
          {!!services && services.map((item,index) => {
            if(item.name === '洗衣機'){
              return (
                <div key={index} className='wanshing-entry busy' onClick={this.ShowFeeModel}>
                  <div className="state-icon"></div>
                  <div className="seal">
                    <span className="seal-time">{item.minTime/60}分鐘 /</span>
                    <span className="money-icon">￥</span>
                    <span className="seal-money">{item.price}</span>
                  </div>
                  <div className="entry-text">我要洗衣</div>
                </div>
              );
            }else if(item.name === '烘乾機'){
              return(
                <div key={index} className="drying-entry maintenance" onClick={this.ToDry}>
                  <div className="state-icon"></div>
                  <div className="seal">
                    <span className="seal-time">{item.minTime/60}分鐘 /</span>
                    <span className="money-icon">￥</span>
                    <span className="seal-money">{item.price}</span>
                  </div>
                  <div className="entry-text">我要烘乾</div>
                </div>
              // <div className="refer-time">參考剩餘時間：20分鐘</div>
              );
            }
            return null;
          })}
        </div>