From 8e43f063251a6875a6792a5b31545bcd97c6683d Mon Sep 17 00:00:00 2001
From: Asheem Mamoowala <asheem.mamoowala@mapbox.com>
Date: Mon, 1 Jul 2019 11:08:06 -0700
Subject: [PATCH] fix #8411, fetch in case of cache error (#8415) (#8417)

* fix #8411, fetch in case of cache error

* Use warnOnce
---
 src/util/ajax.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/util/ajax.js b/src/util/ajax.js
index 374be504772..4f889301573 100644
--- a/src/util/ajax.js
+++ b/src/util/ajax.js
@@ -1,7 +1,7 @@
 // @flow
 
 import window from './window';
-import { extend } from './util';
+import { extend, warnOnce } from './util';
 import { isMapboxHTTPURL, hasCacheDefeatingSku } from './mapbox';
 import config from './config';
 import assert from 'assert';
@@ -111,7 +111,11 @@ function makeFetchRequest(requestParameters: RequestParameters, callback: Respon
 
     const validateOrFetch = (err, cachedResponse, responseIsFresh) => {
         if (err) {
-            return callback(err);
+            // Do fetch in case of cache error.
+            // HTTP pages in Edge trigger a security error that can be ignored.
+            if (err.message !== 'SecurityError') {
+                warnOnce(err);
+            }
         }
 
         if (cachedResponse && responseIsFresh) {