From 718e71955ba529b59dd8b3b62411bca06ccce45f Mon Sep 17 00:00:00 2001
From: "John Molakvoæ (skjnldsv)" <skjnldsv@protonmail.com>
Date: Tue, 7 May 2019 18:20:24 +0200
Subject: [stable15] Set Edge < 16 as incompatible with css vars
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Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
---
 core/js/js.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'core/js')

diff --git a/core/js/js.js b/core/js/js.js
index 5429aaf1a55..5a187cd8fbb 100644
--- a/core/js/js.js
+++ b/core/js/js.js
@@ -1351,8 +1351,13 @@ function initCore() {
 	}
 
 	// css variables fallback for IE
-	if (msie > 0 || trident > 0) {
-		cssVars();
+	if (msie > 0 || trident > 0 || edge > 0) {
+		console.info('Legacy browser detected, applying css vars polyfill')
+		cssVars({
+			//  set edge < 16 as incompatible
+			onlyLegacy: !(/Edge\/([0-9]{2})\./i.test(navigator.userAgent)
+				&& parseInt(/Edge\/([0-9]{2})\./i.exec(navigator.userAgent)[1]) < 16)
+		});
 	}
 
 	$(window).on('unload.main', function() {
-- 
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