1 files changed, 13 insertions, 0 deletions
diff --git a/web/static/dartboat.js b/web/static/dartboat.js
index 39e0371..6051b7e 100644
--- a/web/static/dartboat.js
+++ b/web/static/dartboat.js
@@ -197,3 +197,16 @@ document.addEventListener('keydown', e => {
 
 if ('serviceWorker' in navigator)
 	navigator.serviceWorker.register('sw.js');
+
+// disable back button when installed as a PWA. a single click exits the app,
+// destroying match state without confirmation, so we must resort to this.
+if (window.matchMedia('(display-mode: standalone)').matches) {
+	window.addEventListener('load', () => {
+		if (!history.state) {
+			history.replaceState(true, '');
+			history.pushState(true, '');
+		}
+	});
+
+	window.addEventListener('popstate', () => history.pushState(true, ''));
+}