Thanks. The target audience here is beginners to programming or JS. I think learning ES5 isn’t a stumbling block, and it’s probably good as a basis to go on and

Thanks. The target audience here is beginners to programming or JS. I think learning ES5 isn’t a stumbling block, and it’s probably good as a basis to go on and learn ES6 features later. It’s more like learning the core features rather than an out of date version. I use typescript at work and I still use functions instead of lambdas, closures instead of classes where it makes sense for clarity.