I've been away from JS for about 10 months and... cool, but, fuck, that changed quickly. Time to get caught back up to speed. Is ES6 now actually viable, in that it's supported by most users' browsers? If not, are there popular compilers for ES5?
"Everyone" is using Babel now. A lot of ES6 features are making their way into browsers and node, but there's so much variation that a transpile step is needed. Babel is nice but currently quite slow. Babel has a REPL you can play with here: http://babeljs.io/repl/#?experimental=true&evaluate=true&loo...
Correct. One of my favourite at the moment is `babel-plugin-rewire`, which is a neat replacement for `rewire` -- allowing easy unit testing in full isolation by hijacking the `import` statements :)
You can use Typescript as well for an alternative to Babel, it doesn't have all the features Babel has (like async/await) but they are planned. And you get types at the same time.
