JSFiddle - React, Tailwind, and code Playground

HTML

<h1>tableToExcel Demo</h1>
<p>Exporting the W3C Example Table</p>
<a id="dlink"  style="display:none;"></a>
    <input type="button" onclick="tableToExcel('testTable', 'W3C Example Table', 'MyFile.xls')" value="Export to Excel">
        
<table id="testTable" summary="Code page support in different versions of MS Windows." rules="groups" frame="hsides" border="2">
    <caption>CODE-PAGE SUPPORT IN MICROSOFT WINDOWS</caption>
    <colgroup align="center"></colgroup>
    <colgroup align="left"></colgroup>
    <colgroup span="2" align="center"></colgroup>
    <colgroup span="3" align="center"></colgroup>
    <thead valign="top">
        <tr>
            <th>Code-Page
                <br>ID</th>
            <th>Name</th>
            <th>ACP</th>
            <th>OEMCP</th>
            <th>Windows
                <br>NT 3.1</th>
            <th>Windows
                <br>NT 3.51</th>
            <th>Windows
                <br>95</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>1200</td>
            <td style="background-color: #00f; color: #fff">Unicode (BMP of ISO/IEC-10646)</td>
            <td></td>
            <td></td>
            <td>X</td>
            <td>X</td>
            <td>*</td>
        </tr>
        <tr>
            <td>1250</td>
            <td style="font-weight: bold">Windows 3.1 Eastern European</td>
            <td>X</td>
            <td></td>
            <td>X</td>
            <td>X</td>
            <td>X</td>
        </tr>
        <tr>
            <td>1251</td>
            <td>Windows 3.1 Cyrillic</td>
            <td>X</td>
            <td></td>
            <td>X</td>
            <td>X</td>
            <td>X</td>
        </tr>
        <tr>
            <td>1252</td>
            <td>Windows 3.1 US (ANSI)</td>
            <td>X</td>
            <td></td>
            <td>X</td>
            <td>X</td>
            <td>X</td>
        </tr>
        <tr>
            <td>1253</td>
            <td>Windows 3.1 Greek</td>
           ...

JavaScript

var tableToExcel = (function () {
    var uri = 'data:application/vnd.ms-excel;base64,',
        template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body><table>{table}</table></body></html>',
        base64 = function (s) {
            return window.btoa(unescape(encodeURIComponent(s)))
        }, format = function (s, c) {
            return s.replace(/{(\w+)}/g, function (m, p) {
                return c[p];
            })
        }
    return function (table, name, filename) {
        if (!table.nodeType) table = document.getElementById(table)
        var ctx = {
            worksheet: name || 'Worksheet',
            table: table.innerHTML
        }
   document.getElementById("dlink").href = uri + base64(format(template, ctx));
            document.getElementById("dlink").download = filename;
            document.getElementById("dlink").click();
    }
})()