JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <thead>
    <tr>
        <th>Header1</th>
        <th>Header2</th>
    </tr>
    </thead>
    <tbody>
        <tr>
            <td><input id="Cells_0__Text" name="Cells[0].Text" type="text" value="text0" /></td>
            <td><a onclick="getData()">Update</a></td>
        </tr>
        <tr>
            <td><input id="Cells_1__Text" name="Cells[1].Text" type="text" value="text1" /></td>
            <td><a onclick="getData()">Update</a></td>
        </tr>
        <tr>
            <td><input id="Cells_2__Text" name="Cells[2].Text" type="text" value="text2" /></td>
            <td><a onclick="getData()">Update</a></td>
        </tr>
    </tbody>
    
</table>

JavaScript

function getData() {
var outputArr = [];

$('td').each(function() {
   outputArr.push($(this).find('input').val() || $(this).text());
});

var output = outputArr.toString();
alert(output);
};