Does firebase functions support ES6?

The long answer about why this is a complicated problem has been discussed in some blogs, for example here and here. EDIT: The firebase CLI now supports projects using TypeScript, which gives you access to ES7 syntax. It will automatically compile that down to ES6 for deployment to Cloud Functions .

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What are Firebase functions for?

Firebase gives mobile developers access to a complete range of fully managed mobile-centric services including analytics, authentication and Realtime Database . Cloud Functions rounds out the offering by providing a way to extend and connect the behavior of Firebase features through the addition of server-side code.

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