Add scroll preserving snippet

src/front/index.ts

@@ -1 +1,31 @@
 export * from "./controllers.js";
+
+(function enableScrollPreservation() {
+	/* https://github.com/hotwired/turbo/issues/37#issuecomment-1422200868 */
+	Turbo.scrollTop = 0;
+
+	Turbo.shouldPreserveScroll = false;
+
+	let shouldPreserveScroll = 0;
+
+	document.addEventListener("turbo:click", function (event) {
+		if (event.target.hasAttribute("data-turbo-preserve-scroll")) {
+			shouldPreserveScroll = true;
+		} else {
+			shouldPreserveScroll = false;
+		}
+	});
+
+	document.addEventListener("turbo:visit", function (event) {
+		if (shouldPreserveScroll) {
+			Turbo.scrollTop = document.documentElement.scrollTop;
+		} else {
+			Turbo.scrollTop = 0;
+		}
+	});
+
+	addEventListener("turbo:visit", () => {
+		Turbo.navigator.currentVisit.scrolled = true;
+		document.documentElement.scrollTop = Turbo.scrollTop;
+	});
+})();