Defense against window.prototype

douglascrockford · Oct 8, 2012 · 43d7836 · 43d7836
1 parent 40f3377
commit 43d7836
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Showing 2 changed files with 4 additions and 6 deletions.
diff --git a/json.js b/json.js
@@ -1,6 +1,6 @@
 /*
     json.js
-    2011-08-30
+    2012-10-08
 
     Public Domain
 
@@ -196,8 +196,7 @@
 // Create a JSON object only if one does not already exist. We create the
 // methods in a closure to avoid creating global variables.
 
-var JSON;
-if (!JSON) {
+if (typeof JSON !== 'object') {
     JSON = {};
 }
 

diff --git a/json2.js b/json2.js
@@ -1,6 +1,6 @@
 /*
     json2.js
-    2011-10-19
+    2012-10-08
 
     Public Domain.
 
@@ -159,8 +159,7 @@
 // Create a JSON object only if one does not already exist. We create the
 // methods in a closure to avoid creating global variables.
 
-var JSON;
-if (!JSON) {
+if (typeof JSON !== 'object') {
     JSON = {};
 }