startscreen: lock UI until all scripts are loaded and ready

1 files changed, 5 insertions, 0 deletions

diff --git a/beamer/viewer/viewer.js b/beamer/viewer/viewer.js
index e9c6d65..a614c88 100644
--- a/beamer/viewer/viewer.js
+++ b/beamer/viewer/viewer.js
@@ -26,9 +26,14 @@ class Viewer {
     this.fileReader = new FileReader();
     this.presentation = null;
 
+    document.addEventListener("DOMContentLoaded", () => this._unlockUi());
     this._listenForInput();
   }
 
+  _unlockUi() {
+    this.fileInput.disabled = false;
+  }
+
   _preparePresentation(source) {
     const self = this;
     pdfjsLib.getDocument(source).then(function(pdf) {