Checking someones bandwidth and loading content based on it

Question

I have seen a number of questions that don\'t answer this, is it possible to check someones bandwidth using java script and load specific content based on it?

The BBC se

Answer 1

I have released BwCh which is an open-source JavaScript API to detect bandwidth for web-based environments

It is built with ES2015. It uses some of the latest JavaScript innovation (window.navigator.connection currently supported in Chrome 48+ for Android as of April 2016) in order to provide a flexible method to detect bandwidth for both mobile and desktop devices. It fallbacks/complements to image pre-loading to detect bandwidth where those newest API are not available.