Question

I’m trying to find a way to add a class to a td based on whether it’s positive or negative, not within the first <tr> and not within the first <td> of a <tr>.

I can’t find much on the either issue through searching. Does anyone know how to do this?

Answer 1

You mean if the <td> contains a positive or negative number? If that’s what you’re trying to do, you could use this:

$(document).ready(function() {
    $("tr:not(:first)").find("td:not(:first)").each(function() {
        if ($(this).text() > 0)
            $(this).addClass("positive");
        else if ($(this).text() < 0)
            $(this).addClass("negative");
    })
});

I tested this on the following table and it worked fine:

<table>
    <tr>
        <td>3</td>
        <td>9</td>
        <td>-3</td>
    </tr>
    <tr>
        <td>8</td>
        <td>-4</td>
        <td>9</td>
    </tr>
    <tr>
        <td>-7</td>
        <td>12</td>
        <td>144</td>
    </tr>
</table>