JSFiddle - React, Tailwind, and code Playground

HTML

<p>
    All rows with at least 3 cells have a yellow background:
</p>

<table id="myTable">
    <tr>
        <td>cell</td><td>cell</td><td>cell</td><td>cell</td>
    </tr>
    <tr>
        <td>cell</td><td>cell</td>
    </tr>
    <tr>
        <td>cell</td>
    </tr>
    <tr>
        <td>cell</td><td>cell</td><td>cell</td>
    </tr>
</table>

CSS

body {
    padding: 1em;
}

td {
    padding: 1em;
    border: 1px solid gray;
}

.selected {
    background-color: #ff0;
}

JavaScript

var table = $( '#myTable' )[0];
var nr = 3; // the column number

$( table.rows ).each( function () {    
    if ( $( this.cells ).eq( nr - 1 ).text() ) {
        $( this ).addClass( 'selected' );
    }
});