How to Get the Height of Hidden Elements in jQuery?

Determining the Height of Hidden Elements in jQuery

When dealing with hidden elements, it can be challenging to determine their dimensions. This issue arises when needing to retrieve the height of an element located within a hidden parent. A common approach involves temporarily showing the parent element, extracting the height, and then hiding it again.

However, this method can seem inefficient. Is there a more optimal solution?

For jQuery users, a more sophisticated approach can be employed to retrieve element heights even when hidden. By leveraging jQuery's "absolute" positioning and "visibility" manipulation, we can temporarily make hidden elements visible for measurement purposes:

<code class="javascript">var previousCss = $("#myDiv").attr("style");

$("#myDiv").css({
    position: 'absolute', // Optional if #myDiv is already absolute
    visibility: 'hidden',
    display: 'block'
});

optionHeight = $("#myDiv").height();

$("#myDiv").attr("style", previousCss ? previousCss : "");</code>

This technique involves setting the element with the hidden parent to have an absolute position, which removes it from the normal document flow, and a hidden visibility, making it invisible to the user. Subsequently, the "display" property is set to "block," which allows the element to occupy space, catering to height measurement.

After retrieving the height, the original CSS style is restored to maintain the element's prior state. This approach offers a more concise and efficient way to determine the height of hidden elements in jQuery, avoiding temporary display changes and unnecessary flickering.

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