1 files changed, 3 insertions, 0 deletions
diff --git a/vnext/src/App.js b/vnext/src/App.js
index d4e3acfe..a74934ab 100644
--- a/vnext/src/App.js
+++ b/vnext/src/App.js
@@ -38,6 +38,9 @@ export default class App extends React.Component {
   }
 
   initES = () => {
+    if (!('EventSource' in window)) {
+      return;
+    }
     const params = { hash: this.state.visitor.hash };
     let url = new URL(`https://api.juick.com/events?${qs.stringify(params)}`);
     this.es = new EventSource(url);