async,await只能处理正常的promise，返回已经兑现的promise，不能处理已拒绝的promise

    async created(){//调用后端fetch接口查询数据let data =  await fetch({url:'goods-type/list/all',method:'get',})}

为了处理已拒绝的promise，加try,catch

  async created() {try {//调用后端接口查询数据let data = await fetch({url: "goods-type/list/all",method: "get",});} catch (e) {console.log(e);}},