1 files changed, 2 insertions, 0 deletions
diff --git a/vnext/src/index.js b/vnext/src/index.js
index 0a8eb369..5bf7c021 100644
--- a/vnext/src/index.js
+++ b/vnext/src/index.js
@@ -28,7 +28,9 @@ class App extends React.Component {
     this.wScrollCurrent = 0;
     this.wScrollBefore = 0;
     this.wScrollDiff = 0;
+  }
 
+  componentDidMount() {
     window.addEventListener('scroll', this.throttle(500, () => {
       this.dHeight = document.body.offsetHeight;
       this.wHeight = window.innerHeight;