RunKit + 
Try any Node.js package right in your browser
This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including firestore-backfire. Try it out:
require("@aws-sdk/client-s3/package.json"); // @aws-sdk/client-s3 is a peer dependency.
require("@aws-sdk/credential-provider-ini/package.json"); // @aws-sdk/credential-provider-ini is a peer dependency.
require("@google-cloud/firestore/package.json"); // @google-cloud/firestore is a peer dependency.
require("@google-cloud/storage/package.json"); // @google-cloud/storage is a peer dependency.
var firestoreBackfire = require("firestore-backfire")
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require()any package directly from npm- use arrow functions, classes, template strings, and most of ES6
awaitany promise instead of using callbacks (example)- create your own embedded node.js snippets
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