Let's start off by providing a background on JavaScript cloud libraries. JavaScript has been around since the dawn of the internet (1995, for argument's sake). It has become a language that can turn a HTML web page into a fully functioning desktop equivalent app. Personally, I find JavaScript to be one of the most useful programming languages out there (besides Python, of course).
JavaScript was released in 1995 and was designed to work with the most popular web browser at the time, Netscape Navigator. It was originally called livescript, but the name was changed to JavaScript due to the use and support of Java within the Netscape Navigator browser. Despite the similar syntax, Java and JavaScript really have nothing to do with each other—a confusing fact that continues to this day.