fix(flushMicroTasks): fallback to no scheduler (#739)

Co-authored-by: Kent C. Dodds <[email protected]>
testing-library · Jul 8, 2020 · 9e5cf59 · 9e5cf59
1 parent b81fd01
commit 9e5cf59
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/flush-microtasks.js b/src/flush-microtasks.js
@@ -20,9 +20,6 @@ function getIsUsingFakeTimers() {
 
 const globalObj = typeof window === 'undefined' ? global : window
 let Scheduler = globalObj.Scheduler
-const isModernScheduleCallbackSupported = satisfies(React.version, '>16.8.6', {
-  includePrerelease: true,
-})
 
 let didWarnAboutMessageChannel = false
 let enqueueTask
@@ -58,9 +55,14 @@ try {
           'if you encounter this warning.',
       )
     }
+
   }
 }
 
+const isModernScheduleCallbackSupported = Scheduler && satisfies(React.version, '>16.8.6', {
+  includePrerelease: true,
+})
+
 function scheduleCallback(cb) {
   const NormalPriority = Scheduler
     ? Scheduler.NormalPriority || Scheduler.unstable_NormalPriority