From 718efdbd78e7d5f30d2f534d5118761318e00cfa Mon Sep 17 00:00:00 2001
From: Ellis Tsung <git@tsung.co>
Date: Sun, 25 Dec 2016 21:45:05 -0500
Subject: [PATCH] Disable localStorage.setItem in Private mode
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Will throw QuotaExceededError when called.
There shouldn’t be any need to use a shim for this since no solution would be persistent in Private mode.
---
 platform/safari/vapi-common.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/platform/safari/vapi-common.js b/platform/safari/vapi-common.js
index a2285462b71b7..26d99e11b11bf 100644
--- a/platform/safari/vapi-common.js
+++ b/platform/safari/vapi-common.js
@@ -157,4 +157,16 @@ Number.prototype.toLocaleString = function() {
 
 vAPI.localStorage = self.localStorage;
 
+// Disable localStorage.setItem in Private Browsing mode (throws error)
+// https://gist.github.com/philfreo/68ea3cd980d72383c951
+if (typeof self.localStorage === 'object') {
+    try {
+        self.localStorage.setItem('localStorage', 1);
+        self.localStorage.removeItem('localStorage');
+    } catch (e) {
+        Storage.prototype._setItem = Storage.prototype.setItem;
+        Storage.prototype.setItem = function() {};
+    }
+}
+
 })();