@segment/analytics-next/src/lib/get-global.ts

Analytics Next (aka Analytics 2.0) is the latest version of Segment’s JavaScript SDK - enabling you to send your data to any tool without having to learn, test, or use a new API every time.

// This an imperfect polyfill for globalThis
export const getGlobal = () => {
  if (typeof globalThis !== 'undefined') {
    return globalThis
  }
  if (typeof self !== 'undefined') {
    return self
  }
  if (typeof window !== 'undefined') {
    return window
  }
  if (typeof global !== 'undefined') {
    return global
  }
  return null
}