ExportTxt("文件名","文件内容")

    function ExportTxt(name, data) {
        const urlObject = window.URL || window.webkitURL || window;
        const export_blob = new Blob([data]);

        const save_link = document.createElementNS("http://www.w3.org/1999/xhtml", "a");
        save_link.href = urlObject.createObjectURL(export_blob);
        save_link.download = name;

        const ev = document.createEvent("MouseEvents");
        ev.initMouseEvent("click", true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
        save_link.dispatchEvent(ev);
    }

https://blog.csdn.net/weixin_46094786/article/details/121291897