How to export html table to excel using javascript

Check https://github.com/linways/table-to-excel.
Its a wrapper for exceljs/exceljs to export html tables to xlsx.

TableToExcel.convert(document.getElementById("simpleTable1"));
<script src="https://cdn.jsdelivr.net/gh/linways/[email protected]/dist/tableToExcel.js"></script>
<table id="simpleTable1" data-cols-width="70,15,10">
<tbody>
    <tr>
        <td class="header" colspan="5" data-f-sz="25" data-f-color="FFFFAA00" data-a-h="center" data-a-v="middle" data-f-underline="true">
            Sample Excel
        </td>
    </tr>
    <tr>
        <td colspan="5" data-f-italic="true" data-a-h="center" data-f-name="Arial" data-a-v="top">
            Italic and horizontal center in Arial
        </td>
    </tr>
    <tr>
        <th data-a-text-rotation="90">Col 1 (number)</th>
        <th data-a-text-rotation="vertical">Col 2</th>
        <th data-a-wrap="true">Wrapped Text</th>
        <th data-a-text-rotation="-45">Col 4 (date)</th>
        <th data-a-text-rotation="-90">Col 5</th>
    </tr>
    <tr>
        <td rowspan="1" data-t="n">1</td>
        <td rowspan="1" data-b-b-s="thick" data-b-l-s="thick" data-b-r-s="thick">
            ABC1
        </td>
        <td rowspan="1" data-f-strike="true">Striked Text</td>
        <td data-t="d">05-20-2018</td>
        <td data-t="n" data-num-fmt="$ 0.00">2210.00</td>
    </tr>

    <tr>
        <td rowspan="2" data-t="n">2</td>
        <td rowspan="2" data-fill-color="FFFF0000" data-f-color="FFFFFFFF">
            ABC 2
        </td>
        <td rowspan="2" data-a-indent="3">Merged cell</td>
        <td data-t="d">05-21-2018</td>
        <td data-t="n" data-b-a-s="dashed" data-num-fmt="$ 0.00">230.00</td>
    </tr>
    <tr>
        <td data-t="d">05-22-2018</td>

        <td data-t="n" data-num-fmt="$ 0.00">2493.00</td>
    </tr>

    <tr>
        <td colspan="4" align="right" data-f-bold="true" data-a-h="right" data-hyperlink="https://google.com">
            <b><a href="https://google.com">Hyperlink</a></b>
        </td>
        <td colspan="1" align="right" data-t="n" data-f-bold="true" data-num-fmt="$ 0.00">
            <b>4933.00</b>
        </td>
    </tr>
    <tr>
        <td colspan="4" align="right" data-f-bold="true" data-a-rtl="true">
            مرحبا
        </td>
        <td colspan="1" align="right" data-t="n" data-f-bold="true" data-num-fmt="$ 0.00">
            <b>2009.00</b>
        </td>
    </tr>
    <tr>
        <td data-b-a-s="dashed" data-b-a-c="FFFF0000">All borders</td>
    </tr>
    <tr>
        <td data-t="b">true</td>
        <td data-t="b">false</td>
        <td data-t="b">1</td>
        <td data-t="b">0</td>
        <td data-error="#VALUE!">Value Error</td>
    </tr>
    <tr>
        <td data-b-t-s="thick" data-b-l-s="thick" data-b-b-s="thick" data-b-r-s="thick" data-b-t-c="FF00FF00" data-b-l-c="FF00FF00" data-b-b-c="FF00FF00" data-b-r-c="FF00FF00">
            All borders separately
        </td>
    </tr>
    <tr data-exclude="true">
        <td>Excluded row</td>
        <td>Something</td>
    </tr>
    <tr>
        <td>Included Cell</td>
        <td data-exclude="true">Excluded Cell</td>
        <td>Included Cell</td>
    </tr>
</tbody>
</table>

This creates valid xlsx on the client side. Also supports some basic styling. Check https://codepen.io/rohithb/pen/YdjVbb for a working example.

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