JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tr>
    <td>Name</td><td><input type="text" name="name"></td>
</tr>
<tr>
    <td>Mail</td><td><input type="text" name="name"></td>
</tr>
</table>

CSS

tr.highlight{
    background-color:yellow;
}

JavaScript

$("tr > td > input").focus(function(e){
    $(this).parent().parent().addClass('highlight');
}).blur(function(e){
    $(this).parent().parent().removeClass('highlight');
});