JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>phone</td>
           <td>akfg</td>
           <td>akfg</td>
           <td>akfg</td>
           <td>akfg</td>
    </tr>    
        
            <tr class="email">
        <td>email</td>
           <td>akfg</td>
           <td>akfg</td>
           <td>akfg</td>
           <td>akfg</td>
    </tr>  
            <tr>
        <td>im</td>
           <td>akfg</td>
           <td>akfg</td>
           <td>akfg</td>
           <td>akfg</td>
    </tr>  
</table>
<button > click me</button>

JavaScript

$(function(){
    $("button").on('click', function(){
        var data = "tt"
        var em=".email";
        $("table").find(""+em).append(data);
    });
});