下载文件

  const downFile = (cont, name) => {
            const blob = new Blob([cont], {
                type: "text/plain",
            });
            const fileName = name;
            const down = document.createElement("a");
            down.download = fileName;
            down.style.display = "none";
            down.href = URL.createObjectURL(blob);
            document.body.appendChild(down);
            down.click();
            URL.revokeObjectURL(down.href); // 释放URL 对象
            document.body.removeChild(down); //下载完成移除
        };