fix: Add friendly error if canvasElementId missing(#2885)

excaliburjs · Jan 14, 2024 · 9c46824 · 9c46824
1 parent 4639bf9
commit 9c46824
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/engine/Engine.ts b/src/engine/Engine.ts
@@ -696,6 +696,12 @@ O|===|* >________________>\n\
 
     if (options.canvasElementId) {
       this._logger.debug('Using Canvas element specified: ' + options.canvasElementId);
+
+      //test for existence of element
+      if (document.getElementById(options.canvasElementId) === null)  {
+        throw new Error('Cannot find existing element in the DOM, please ensure element is created prior to engine creation.');
+      }
+
       this.canvas = <HTMLCanvasElement>document.getElementById(options.canvasElementId);
     } else if (options.canvasElement) {
       this._logger.debug('Using Canvas element specified:', options.canvasElement);