Promise.race解决fetch的超时场景

 // prmoise.race 实现请求超时拦截
      const TimeOutFn = (url,time)=>{

        // 创建定时器reject函数
        const timeOut = new Promise((resolve,reject)=>{
          setTimeout(()=>{
            reject("请求超时")
          },time)
        })
        const FetchData = fetch(url)
        
        return Promise.race([timeOut,FetchData])
      }


      TimeOutFn("https://dog.ceo/api/breeds/image/random",2).catch(res=>{
        console.log(res)
      })