From 6d79aa43babb8330e7e91b4f2071979b220ef365 Mon Sep 17 00:00:00 2001
From: gorhill <rhill@raymondhill.net>
Date: Thu, 21 Apr 2016 12:48:07 -0400
Subject: [PATCH] #956/#1497: minor code review

---
 platform/chromium/vapi-client.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/platform/chromium/vapi-client.js b/platform/chromium/vapi-client.js
index 69fa7244e..bed173ef9 100644
--- a/platform/chromium/vapi-client.js
+++ b/platform/chromium/vapi-client.js
@@ -349,8 +349,11 @@ vAPI.shutdown.add(function() {
 // search for "https://github.com/gorhill/uBlock/issues/1497".
 
 (function() {
-    // Don't bother if WebSocket is not supported.
-    if ( window.WebSocket instanceof Function === false ) {
+    // Fix won't be applied on older versions of Chromium.
+    if (
+        window.WebSocket instanceof Function === false ||
+        window.WeakMap instanceof Function === false
+    ) {
         return;
     }