获取js文件中函数体 进行字符串转化

 import("@/common/utils/compressImg.js").then((res) => {
        let keys = Object.keys(res);
        let fns = keys
          .reduce((initial, next) => {
            return initial.concat(res[next]);
          }, [])
          .join("\n");
          console.log(fns )
      });