globalThis ponyfill.

index.js

function getGlobalThis() {
	if (typeof globalThis === 'object') return globalThis;

	Object.defineProperty(Object.prototype, '__magic__', {
		get: function() {
			return this;
		},
		configurable: true
	});

	const globalThis_ = __magic__;
	delete Object.prototype.__magic__;
  
  return globalThis_
}