Babel comes with Core.js [1] built in, which is (I believe) a better and more exhaustive shim library than es6-shim and the others. [1] https://github.com/zloi

Babel comes with Core.js [1] built in, which is (I believe) a better and more exhaustive shim library than es6-shim and the others. [1] https://github.com/zloirock/core-js https://github.com/zloirock/core-js