What is the best method to determine offsetTop in relation to the parent element instead of the top of

I have a straightforward inquiry: How can one determine the offsetTop of a child element in relation to its parent element rather than the top of the window?

The definition of offsetTop indicates that it should give the distance by which a child element is offset from the top of an offsetParent, but this does not appear to be the case in the following JSFiddle example: http://jsfiddle.net/h5KBK/.

My objective is to ascertain the offset of the highlighted orange text from the top of the scrollable div, instead of measuring from the top of the window. Is there a way to achieve this without having to calculate the heights of preceding elements, paddings, margins, etc., and subsequently subtracting them from the offsetTop value?

I am seeking a solution using only JavaScript. Please refrain from using jQuery.

javascripthtmlcss

Answer №1

According to its definition, offsetTop provides the top position of an object in relation to the top side of its offsetParent element, measured in pixels.

It is essential for offsetParent to be an element with a non-static position. Changing the position attribute of the scroll element in your demo results in a value of 1012 as opposed to 1110 without this attribute.

Answer №2

After further investigation, I conducted additional research and managed to uncover the solution. It appears that for the offsetParent to function properly, it requires a specific declaration of either position:absolute or position:relative. This can be observed in action through the following JSFiddle link: http://jsfiddle.net/h5KBK/1/

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