More reliable refresh that possible can handle app downtime

src/back/routes/dashboard.sreact.tsx

@@ -40,8 +40,12 @@ export default new (class DashboardPage extends StatefulPage<State, typeof actio
 	}
 
 	wrapInLayout(ctx: BaseContext, content: Templatable): Templatable {
+		if (ctx.headers["just-data"]) {
+			return content;
+		} else {
 			return html(ctx, "Dashboard", content, { navbar: () => "" });
 		}
+	}
 
 	render(ctx: BaseContext, state: State, inputs: Record<string, string>) {
 		const date = new Date();
@@ -75,13 +79,24 @@ export default new (class DashboardPage extends StatefulPage<State, typeof actio
 					</tbody>
 				</table>
 
-				{
+				{ctx.headers["just-data"]
-					/* HTML */ `<script>
+					? ""
-						setInterval(function () {
+					: /* HTML */ `<script>
-							document.location = document.location;
+							function refresh() {
-						}, 15 * 1000);
+								let xhr = new XMLHttpRequest();
-					</script>`
+								xhr.withCredentials = true;
+								xhr.open("GET", "/dashboard");
+								xhr.setRequestHeader("just-data", "true");
+
+								xhr.onload = function () {
+									document.querySelector("body").innerHTML =
+										xhr.response;
+								};
+								xhr.send();
 							}
+
+							setInterval(refresh, 15 * 1000);
+					  </script>`}
 			</div>
 		);
 	}