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 @alexmironov/cosmos. Try it out:
require("@reduxjs/toolkit/package.json"); // @reduxjs/toolkit is a peer dependency.
require("react/package.json"); // react is a peer dependency.
require("react-dom/package.json"); // react-dom is a peer dependency.
require("react-redux/package.json"); // react-redux is a peer dependency.
require("react-test-renderer/package.json"); // react-test-renderer is a peer dependency.
require("redux-observable/package.json"); // redux-observable is a peer dependency.
require("rxjs/package.json"); // rxjs is a peer dependency.
var cosmos = require("@alexmironov/cosmos")
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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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