Fixed an issue with not being able to run XState in a web-worker (#1407)

* allow running xstate in a web-worker * Update .changeset/nervous-shoes-retire.md Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com> * use self instead of window to simplify the code Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>
statelyai · Aug 26, 2020 · ad3026d · ad3026d
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diff --git a/.changeset/nervous-shoes-retire.md b/.changeset/nervous-shoes-retire.md
@@ -0,0 +1,5 @@
+---
+'xstate': patch
+---
+
+Fixed an issue with not being able to run XState in Web Workers due to assuming that `window` or `global` object is available in the executing environment, but none of those are actually available in the Web Workers context.
diff --git a/packages/core/src/interpreter.ts b/packages/core/src/interpreter.ts
@@ -124,7 +124,7 @@ export class Interpreter<
     },
     logger: global.console.log.bind(console),
     devTools: false
-  }))(typeof window === 'undefined' ? global : window);
+  }))(typeof self !== 'undefined' ? self : global);
   /**
    * The current state of the interpreted machine.
    */