How Can I Efficiently Get the Height of a Hidden Element Using jQuery?

Getting Height of Hidden Elements with jQuery

Determining the height of an element hidden within a concealed parent div can be challenging. It's inefficient to temporarily reveal the element just to obtain its height and then hide it again. Here's a more optimal solution:

Solution:

You can use the following code snippet:

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 : "");

Explanation:

1. Save the current CSS styles of the div in the previousCss variable.
2. Adjust the div's CSS by setting its position to absolute (optional if it's already absolute), visibility to hidden, and display to block.
3. Obtain the height of the now-visible div and store it in the optionHeight variable.
4. Restore the div's previous CSS styles or remove inline styles if previousCss is empty.

This approach avoids the need for showing and hiding the parent div, resulting in a more efficient way to get the height of the hidden element.

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