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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 icalendar_extension. Try it out:
require("@fullcalendar/core/package.json"); // @fullcalendar/core is a peer dependency.
require("ical.js/package.json"); // ical.js is a peer dependency.
require("luxon/package.json"); // luxon is a peer dependency.
var icalendarExtension = require("icalendar_extension")
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