What are JavaScript promises, and why do you want to make them? Carl and Richard talk to Martine Dowden about all the various async options available in Javascript today, including Callbacks, Promises, Async/Await, and even ReactiveJS! Martine digs into some of the more remarkable features available, including grouping sync calls together so code is only called when they all complete, or the race option where only one needs to complete, and everything else is thrown away. Lots of power is available in Javascript today. Have you taken advantage of it?