With Chrome's Serial API it becomes possible to access USB or serial hardware and interact with it in the browser. The new Leap Motion controller can also be controlled with JavaScript. So let's put these parts together to build a Chrome app, which takes input from a Leap Motion device and controls an Arduio connected via USB.
Why bother with style guides, which ones are there to pick from, what tools can help enforce them. Followed by a very brief look under the cover of esformatter.