All the websites we build should be responsive; not just to browser speed, but to network condition. In this article I'll introduce the Network Information API, that helps us detect a device’s current bandwidth and allows us to modify our site if the speed is slower than we need. Browser support ... We usually can’t expect support for experimental APIs and in this case, the only two browsers that support it are Firefox and Chrome. In both cases, you need browser prefixes. How to use the Network Information...