detect globalThis (#2775)

`globalThis` is a __standard__ global right now should use it whenever available
mobxjs · Feb 2, 2021 · a7c1517 · a7c1517
1 parent 3979bee
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diff --git a/.changeset/shy-mangos-shake.md b/.changeset/shy-mangos-shake.md
@@ -0,0 +1,5 @@
+---
+"mobx": patch
+---
+
+use globalThis in global detection
diff --git a/packages/mobx/src/utils/global.ts b/packages/mobx/src/utils/global.ts
@@ -4,6 +4,9 @@ declare const self: any
 const mockGlobal = {}
 
 export function getGlobal() {
+    if (typeof globalThis !== "undefined") {
+        return globalThis
+    }
     if (typeof window !== "undefined") {
         return window
     }