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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 @firebase/performance-compat. Try it out:
require("@firebase/app-compat/package.json"); // @firebase/app-compat is a peer dependency.
var performanceCompat = require("@firebase/performance-compat")
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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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