This preset isn't working for the moment, do not use it.
Polyfills
Some features are supported in the new EcmaScript specifications, but compiling them is not enough, you need a runtime code to actually use them.
We provide polyfills that are required to run EcmaScript 2015 features on the majority of browsers.
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promisea default implementation that allows you to use promises out of the box. -
Object.assign. This will patch it for buggy browsers or polyfill it when not existent. -
Array.from. Necessary some destructuring features -
Array.prototype.@@iterator. Necessary for arrays support in for..of loops -
Symbol. Necessary for Iterators and for..of loops
We don't include more polyfills because this would create packages that are too big. (100 KB before you add a single line of code.) In the future we will add a way to declare which polyfills you want to add in your project or provide a hosted "Polyfill as a service" server.