JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>Test</td>
        <td>Test2</td>
    </tr>
    <tr>
        <td>Test</td>
        <td>Test2</td>
    </tr>
    <tr>
        <td>Test</td>
        <td>Test2</td>
    </tr>
    <tr>
        <td>Test</td>
        <td>Test2</td>
    </tr>
</table>

JavaScript

var table = document.getElementsByTagName("table")[0];
for (var contador = 0; contador < table.getElementsByTagName("tr").length; contador++) {
    (function (line) {
        line.onclick = function () {
            line.cells[0].textContent = "Row clicked";
        };
    })(table.getElementsByTagName("tr")[contador]);
}