Sorry to be a party pooper again, but https://esdiscuss.org/topic/es8-proposal-optional-static-typ... and https://ecmascript-daily.github.io/pages/status-of-static-ty... ... I'd like to see that myself, but what can you do... I'm learning Rust instead to use this in wasm. With new webpack initiative https://medium.com/webpack/webpack-awarded-125-000-from-moss... it's looking good.