How does .offset() work in JQuery?

Question

JavaScript

I study the positioning of elements on the page.

The question arose : how to find the coordinates of an element relative to the beginning of the document in JavaScript ?

JQuery has the .offset() function, for JS all the articles that I googled are quite different in approaches and old ones.

I would like to understand the most efficient cross-browser IE8+ algorithm.

Answer 1

What prevents to open the source and see?
https://github.com/jquery/jquery/blob/master/src/o...