Merge pull request #771 from dtinth/patch-1

Do not use postMessage on file:// protocols
zloirock · Mar 23, 2020 · a1a702e · a1a702e
2 parents 4546ffe + 0ec69d6
commit a1a702e
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/packages/core-js/internals/task.js b/packages/core-js/internals/task.js
@@ -76,7 +76,13 @@ if (!set || !clear) {
     defer = bind(port.postMessage, port, 1);
   // Browsers with postMessage, skip WebWorkers
   // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
-  } else if (global.addEventListener && typeof postMessage == 'function' && !global.importScripts && !fails(post)) {
+  } else if (
+    global.addEventListener &&
+    typeof postMessage == 'function' &&
+    !global.importScripts &&
+    !fails(post) &&
+    location.protocol !== 'file:'
+  ) {
     defer = post;
     global.addEventListener('message', listener, false);
   // IE8-