Catch errors and rejected promises.

src/battle-scene.ts

@@ -889,6 +889,8 @@ export default class BattleScene extends SceneBase {
 
 		let battleConfig: FixedBattleConfig = null;
 
+		throw new Error('JLIN not implemented.');
+
 		this.resetSeed(newWaveIndex);
 
 		const playerField = this.getPlayerField();

src/main.ts

@@ -9,6 +9,21 @@ import BBCodeText from 'phaser3-rex-plugins/plugins/bbcodetext';
 import TransitionImagePackPlugin from 'phaser3-rex-plugins/templates/transitionimagepack/transitionimagepack-plugin.js';
 import { LoadingScene } from './loading-scene';
 
+
+// Catch global errors and display them in an alert so users can report the issue.
+window.onerror = function (message, source, lineno, colno, error) {
+	console.error(error);
+	let errorString = `Received unhandled error. Open browser console and click OK to see details.\nError: ${message}\nSource: ${source}\nLine: ${lineno}\nColumn: ${colno}\nStack: ${error.stack}`;
+	alert(errorString);
+	// Avoids logging the error a second time.
+	return true;
+};
+
+window.addEventListener('unhandledrejection', (event) => {	
+	let errorString = `Received unhandled promise rejection. Open browser console and click OK to see details.\nReason: ${event.reason}`;
+	alert(errorString);
+  });
+
 const config: Phaser.Types.Core.GameConfig = {
 	type: Phaser.WEBGL,
 	parent: 'app',

src/phases.ts

@@ -330,6 +330,8 @@ export class TitlePhase extends Phase {
           this.scene.sessionPlayTime = 0;
           this.end();
         });
+      }).catch(err => {
+        console.error("Failed to load daily run:\n", err);
       });
     });
   }

src/ui/daily-run-scoreboard.ts

@@ -165,7 +165,7 @@ export class DailyRunScoreboard extends Phaser.GameObjects.Container {
           } else
             this.loadingLabel.setText('No Rankings');
         });
-    });
+    }).catch(err => { console.error("Failed to load daily rankings:\n", err) });
   }
 }
 

src/ui/title-ui-handler.ts

@@ -64,6 +64,9 @@ export default class TitleUiHandler extends OptionSelectUiHandler {
         this.playerCountLabel.setText(`${stats.playerCount} Players Online`);
         if (this.splashMessage === battleCountSplashMessage)
           this.splashMessageText.setText(battleCountSplashMessage.replace('{COUNT}', stats.battleCount.toLocaleString('en-US')));
+      })
+      .catch(err => {
+        console.error("Failed to fetch title stats:\n", err);
       });
   }