Troubling inconsistency in jQuery's .css function performance

I'm facing a problem with the jquery .css function. I am using it to retrieve the actual height of elements that have their height set to auto. The code I am currently using is as follows:

$(this).css({ height: $(this).css("height"), width: $(this).css("width") });

The issue arises when the .css function sometimes returns "0px", sometimes "auto", and other times the actual height (which is the expected behavior). Can someone please point out what I might be doing incorrectly in this case?

javascriptjquerycss

Answer №1

When using $(this).css("height"), you are accessing a specified (or default) value, whereas $(this).height() will give you the actual, measured height of an element.

As stated on http://api.jquery.com/height/:

This method retrieves the current computed height of the first matched element or sets the height for all matched elements.

Similarly, from http://api.jquery.com/css/:

This function retrieves the value of a specific style property for the initial matched element or specifies one or more CSS properties for each item in the selection.

Answer №2

Using $(this).css("height") retrieves the specified value of the CSS property height.

If you need to acquire the actual height of the element, use $(this).height().

Answer №3

The purpose of the provided snippet may not be clear, but a better approach would be to utilize jQuery in a manner that is compatible across different browsers:

$(this).css({ height: $(this).height(), width: $(this).width() });

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