Update

server/state.ts

@@ -0,0 +1,30 @@
+import { signal } from "@preact/signals";
+import { StateUpdater } from "preact/hooks";
+
+export const state = signal("#/");
+let listener: StateUpdater<string> | undefined = undefined;
+
+export function initState(l: StateUpdater<string>) {
+    const hash = document.location.hash;
+    listener = l;
+    if (!hash || hash == "#") {
+        set_state("#/");
+    } else {
+        set_state(hash);
+    }
+    self.addEventListener("popstate", (e) => {
+        const s = e.state;
+        if (typeof s === "string") {
+            l(s);
+        } else {
+            l("#/");
+        }
+    });
+}
+
+export const set_state: StateUpdater<string> = (updater) => {
+    const v = typeof updater === "function" ? updater(state.value) : updater;
+    state.value = v;
+    history.pushState(v, "", v);
+    if (listener) listener(v);
+};