web_editor: correct check of 'rules' property

see issue odoo#22517
camptocamp · Apr 26, 2018 · c200d2e · c200d2e
1 parent f2076e0
commit c200d2e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/addons/web_editor/static/src/js/transcoder.js b/addons/web_editor/static/src/js/transcoder.js
@@ -9,7 +9,7 @@ var getMatchedCSSRules = function (a) {
         var sheets = document.styleSheets;
         for(var i = sheets.length-1; i >= 0 ; i--) {
             var rules;
-            if (sheets[i].rules) {
+            if (sheets[i].hasOwnProperty('rules')) {
                 rules = sheets[i].rules;
             } else {
                 //try...catch because Firefox not able to enumerate document.styleSheets[].cssRules[] for cross-domain stylesheets.