Find compatibility of MutationObserver. Don't observe, if not found

cookpad · Jun 27, 2017 · 5cb4b5f · 5cb4b5f
1 parent c8f6d42
commit 5cb4b5f
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/app/assets/javascripts/kuroko2/instance_linker.js b/app/assets/javascripts/kuroko2/instance_linker.js
@@ -1,4 +1,8 @@
 jQuery(function ($) {
+  var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;
+  if (!MutationObserver) {
+    return;
+  }
   var logParent = document.querySelector('#logs tbody');
   var observer = new MutationObserver(function(mutations) {
     if (mutations.some(function(m) {