feat(utils): Modern implementation of getGlobalObject (#5809)

- Replaces `getGlobalObject` global object detection with a modern implementation taken from `core-js` which is then modified/simplified a little
- Prioritises `globalThis` which was previously removed due to requiring a TypeScript version which was required in a no longer supported version of Angular (#2978)
  - This is a requirement for future support of other js runtimes (#5611)
- No longer uses `isNodeEnv` 🎉
- Caches the global so it doesn't need to be evaluated for every invocation of `getGlobalObject`

packages/utils/src/global.ts

@@ -7,8 +7,6 @@
 
 import { Integration } from '@sentry/types';
 
-import { isNodeEnv } from './node';
-
 /** Internal */
 interface SentryGlobal {
   Sentry?: {
@@ -26,23 +24,53 @@ interface SentryGlobal {
   };
 }
 
-const fallbackGlobalObject = {};
+// The code below for 'isGlobalObj' and 'GLOBAL' was copied from core-js before modification
+// https://github.com/zloirock/core-js/blob/1b944df55282cdc99c90db5f49eb0b6eda2cc0a3/packages/core-js/internals/global.js
+// core-js has the following licence:
+//
+// Copyright (c) 2014-2022 Denis Pushkarev
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+/** Returns 'obj' if it's the global object, otherwise returns undefined */
+function isGlobalObj(obj: { Math?: Math }): any | undefined {
+  return obj && obj.Math == Math ? obj : undefined;
+}
+
+const GLOBAL =
+  (typeof globalThis == 'object' && isGlobalObj(globalThis)) ||
+  // eslint-disable-next-line no-restricted-globals
+  (typeof window == 'object' && isGlobalObj(window)) ||
+  (typeof self == 'object' && isGlobalObj(self)) ||
+  (typeof global == 'object' && isGlobalObj(global)) ||
+  (function (this: any) {
+    return this;
+  })() ||
+  {};
 
 /**
  * Safely get global scope object
  *
  * @returns Global scope object
  */
 export function getGlobalObject<T>(): T & SentryGlobal {
-  return (
-    isNodeEnv()
-      ? global
-      : typeof window !== 'undefined' // eslint-disable-line no-restricted-globals
-      ? window // eslint-disable-line no-restricted-globals
-      : typeof self !== 'undefined'
-      ? self
-      : fallbackGlobalObject
-  ) as T & SentryGlobal;
+  return GLOBAL as T & SentryGlobal;
 }
 
 /**
@@ -57,7 +85,7 @@ export function getGlobalObject<T>(): T & SentryGlobal {
  * @returns the singleton
  */
 export function getGlobalSingleton<T>(name: keyof SentryGlobal['__SENTRY__'], creator: () => T, obj?: unknown): T {
-  const global = (obj || getGlobalObject()) as SentryGlobal;
+  const global = (obj || GLOBAL) as SentryGlobal;
   const __SENTRY__ = (global.__SENTRY__ = global.__SENTRY__ || {});
   const singleton = __SENTRY__[name] || (__SENTRY__[name] = creator());
   return singleton;