fix tabs_bar.js (#4436)

a46ba4a8 · みたらしだんご · Eugen Rochko · c71874b8 · a46ba4a8
Commit a46ba4a8 authored 7 years ago by みたらしだんご Committed by Eugen Rochko 7 years ago
--- a/app/javascript/mastodon/features/ui/components/tabs_bar.js
+++ b/app/javascript/mastodon/features/ui/components/tabs_bar.js
@@ -48,7 +48,9 @@ export default class TabsBar extends React.Component {
      const nextTab = tabs.find(tab => tab.contains(e.target));
      const { props: { to } } = links[Array(...this.node.childNodes).indexOf(nextTab)];

-      currentTab.classList.remove('active');
+      if (currentTab) {
+        currentTab.classList.remove('active');
+      }

      const listener = debounce(() => {
        nextTab.removeEventListener('transitionend', listener);