This option can be a convenient way for managing polyfills if you don't useīabel. That you can directly include in the HTML page. You can add polyfills manually using your favorite polyfill libraries (forĮxample, core-js). Option 2: (Not Recommended) Add polyfills manually Polyfills might be different or actually already handled for you. Note: If you're using a framework, the work of configuring Babel and adding Targets (option targets) and adding polyfills (option useBuiltIns). Information about the available configuration options for specifying environment Requirements for browser support are always met, even if Firebase or your own Instead, you specify the minimal browser environments that you need to support.īabel then adds the necessary polyfills for you. With Babel, you don't need to worry about the exact polyfills to include. How to integrate Babel with your bundler. Use Babel's interactive setup guide to learn If you're using a bundler, integrate with Babel to get

Required polyfills EnvironmentsĪdd polyfills in your application Option 1: (Recommended) Use bundler integrated with Babel The sections below identify most of the polyfills you might need. If you must support these browsers/environments, then you Older browsers and JavaScript environments do not support all the features The Firebase JavaScript SDK is built on the latest standards of the web platform. Browsers Firebase productĮxcept phone authentication and popup/redirect OAuth operations, are Important: You still need to include polyfills for environments thatĭon't support the features required by Firebase.

The Firebase JavaScript SDK is officially supported in the following environments.

Connect to the Cloud Functions emulator.

Connect to the Cloud Firestore emulator.

Connect to the Realtime Database emulator.

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