Guard against performance.now being unavailable

StileEducation · Nov 21, 2017 · 58c3c0c · 58c3c0c
1 parent 7263bc0
commit 58c3c0c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/js/tether.js b/src/js/tether.js
@@ -47,7 +47,7 @@ const position = () => {
 };
 
 function now() {
-  if (performance && performance.now) {
+  if (typeof performance === 'object' && typeof performance.now === 'function') {
     return performance.now();
   }
   return +new Date;