For those using Babel already or want to use ES6+ on a set of supported browsers: we have started work on https://github.com/babel/babel-preset-env https://gith

For those using Babel already or want to use ES6+ on a set of supported browsers: we have started work on https://github.com/babel/babel-preset-env https://github.com/babel/babel-preset-env. Would appreciate more testing! It allows passing in a set of supported browsers and transpiling what is required using the lowest common denominator env (uses https://github.com/kangax/compat-table https://github.com/kangax/compat-table for data). // .babelrc with preset options { "presets": [ ["env", { "targets": { "chrome": 52, "ie": 11, "browsers": ["last 2 versions", "safari 7"] } }] ] } If you have questions, ask below (or make an issue)