Why do you need this library? Google Chrome (as of version 64) can not estimate the total download size of XMLHTTPRequests when content-encoding: gzip is set, even if the content-length header is set.
A multi-request enhanced XMLHttpRequest javascript library, for those that need a little bit more. - haustvindr/Mex ...
What is AJAX (Asynchronous JavaScript and XML)? AJAX (Asynchronous JavaScript and XML) is a technique aimed at creating better and faster interactive web apps by combining several programming tools, ...