Tips for selecting elements within the overflow container that are hidden:scroll

Is it feasible to fetch all elements located within the "hidden area" of a parent element that has an overflow:scroll property?

A parent container, <div>, has a style of overflow:scroll;height:200px. Within this container is a table. Take a look at the example code below:

<div id="scrollContainer" style="overflow:hidden;height:200px">
    <table>
        <tr>
            <td>...</td>
        <tr>
        <tr>
            <td>...</td>
        <tr>
        ...
        ...
    </table>
</div>

What is the best approach to compile a list of all <tr> elements that are not visible on the screen?

Answer №1

Question number one:

Absolutely! When it comes to JavaScript, the focus is on whether an element exists in the DOM rather than its visibility on the screen.

Hence, using

document.getElementsByTagName('tr');
will fetch all <tr> elements regardless of their current visibility status.

Question number two: Are you wondering about selecting only the visible (or hidden) elements at a specific moment? You can achieve this by utilizing .getBoundingClientRect(); as elaborated here.

Alternatively, if monitoring element visibility is crucial and requires frequent checks, consider implementing a carousel or other similar controlled element structure.

This approach allows you to maintain close watch over each element's state and precisely determine its visibility.

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