Fix Bug MessageChannel in Node Envs (issue #20756)

facebook · Feb 10, 2021 · 10e587c · 10e587c
1 parent b06a1cc
commit 10e587c
Showing 1 changed file with 20 additions and 5 deletions.
diff --git a/packages/scheduler/npm/index.js b/packages/scheduler/npm/index.js
@@ -1,9 +1,24 @@
 'use strict';
 
-if (typeof window === 'undefined' || typeof MessageChannel !== 'function') {
-  module.exports = require('./unstable_no_dom');
-} else if (process.env.NODE_ENV === 'production') {
-  module.exports = require('./cjs/scheduler.production.min.js');
+// Duplicated from 'react/packages/shared/ExecutionEnvironment.js'
+var canUseDom = !!(
+  typeof window !== 'undefined' &&
+  typeof window.document !== 'undefined' &&
+  typeof window.document.createElement !== 'undefined'
+);
+
+// Node environment has cycled global reference
+var isCycledGlobal = !!(
+  typeof global !== 'undefined' &&
+  global.global === global
+);
+
+if (canUseDom && !isCycledGlobal) {
+  if (process.env.NODE_ENV === 'production') {
+    module.exports = require('./cjs/scheduler.production.min.js');
+  } else {
+    module.exports = require('./cjs/scheduler.development.js');
+  }
 } else {
-  module.exports = require('./cjs/scheduler.development.js');
+  module.exports = require('./unstable_no_dom');
 }