Additional fallback for IE11 Script Access Denied error, close #165

zloirock · Mar 8, 2016 · fb3ff34 · fb3ff34
1 parent cfc432a
commit fb3ff34
Show file tree

Hide file tree

Showing 2 changed files with 16 additions and 2 deletions.
diff --git a/library/modules/_classof.js b/library/modules/_classof.js
@@ -4,11 +4,18 @@ var cof = require('./_cof')
   // ES3 wrong here
   , ARG = cof(function(){ return arguments; }()) == 'Arguments';
 
+// fallback for IE11 Script Access Denied error
+var tryGet = function(it, key){
+  try {
+    return it[key];
+  } catch(e){ /* empty */ }
+};
+
 module.exports = function(it){
   var O, T, B;
   return it === undefined ? 'Undefined' : it === null ? 'Null'
     // @@toStringTag case
-    : typeof (T = (O = Object(it))[TAG]) == 'string' ? T
+    : typeof (T = tryGet(O = Object(it), TAG)) == 'string' ? T
     // builtinTag case
     : ARG ? cof(O)
     // ES3 arguments fallback

diff --git a/modules/_classof.js b/modules/_classof.js
@@ -4,11 +4,18 @@ var cof = require('./_cof')
   // ES3 wrong here
   , ARG = cof(function(){ return arguments; }()) == 'Arguments';
 
+// fallback for IE11 Script Access Denied error
+var tryGet = function(it, key){
+  try {
+    return it[key];
+  } catch(e){ /* empty */ }
+};
+
 module.exports = function(it){
   var O, T, B;
   return it === undefined ? 'Undefined' : it === null ? 'Null'
     // @@toStringTag case
-    : typeof (T = (O = Object(it))[TAG]) == 'string' ? T
+    : typeof (T = tryGet(O = Object(it), TAG)) == 'string' ? T
     // builtinTag case
     : ARG ? cof(O)
     // ES3 arguments fallback