Replace the first-child element in a CSS class with a different class

Within a webpage, there is a table nested inside another table. The CSS class first-child assigns a blue background to the first row. How can I prevent this specific styling from affecting the nested table?

Please keep in mind that modifying the original styles is not an option.

Access the JSFiddle here: https://jsfiddle.net/a0muwsk1/

The last CSS block, .Main table table td, failed at overriding the first-child styling...It proved ineffective.

Below is the identical code snippet from the fiddle page:

HTML:

<table class="Main">
    <tr>
        <td>This</td>
        <td>is</td>
        <td>first</td>
        <td>child</td>
    </tr>
    <tr>
        <td>A</td>
        <td>Regular</td>
        <td>Row</td>
        <td>
            <table>
                <tr>
                    <td>Nested</td>
                    <td>first</td>
                    <td>child</td>
                </tr>
                <tr>
                    <td>Nested</td>
                    <td>Table</td>
                    <td>Row</td>
                </tr>
            </table>
        </td>        
    </tr>
</table>

CSS:

.Main table
{
    width: 100%;
    height: 100%;
    margin: 0px;
    padding: 0px;
}

.Main tr:first-child td
{
    background-color: blue;
    text-align: center;
    border-width: 0px 0px 1px 1px;
    font-family: Arial;
    font-weight: bold;
    color: white;
}

.Main td
{
    border: 1px solid black;
    text-align: center;
    font-family: Arial;
    color: black;
}

.Main table table td
{
    border: 1px solid black;
    text-align: center;
    font-family: Arial;
    color: black;
}

Answer №1

Almost there, but your use of

.Main table table td

targets a table nested within another table--one layer too deep. The correct selector should be:

.Main table td

However, keep in mind that this new rule will have lower specificity compared to the existing one:

.Main tr:first-child td

To address this issue, you can mimic the structure of the original rule by adding tr:first-child:

.Main table tr:first-child td

This revised selector will carry higher specificity. You can check the specificity using this tool:

In simpler terms,

If the td is within the first row of a table inside .Main, then do not apply the previous styling (making it blue); instead, opt for transparency or an alternative style.

Check out the live demo here: https://jsfiddle.net/torazaburo/a0muwsk1/6/

Answer №2

You can select direct child elements using the child selector like this: .element > .childElement

Your CSS code will be similar to the following:

.Main > tbody > tr:first-child td
{
    background-color: blue;
    text-align: center;
    border-width: 0px 0px 1px 1px;
    font-family: Arial;
    font-weight: bold;
    color: white;
}

Check out the JSFiddle link for a live example: https://jsfiddle.net/a0muwsk1/3/

Note:

It's important to remember that browsers automatically insert a tbody element when working with tables. To understand more about this behavior, refer to the following explanation: Why doesn't table > tr > td work when using the child selector?

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