reload app_window on every code execution

docs/examples/todos-preact/app.js

@@ -2,8 +2,15 @@ import {render} from 'https://unpkg.com/preact?module';
 
 let state, component, root
 
+if(globalThis.leporello) {
+  // See https://github.com/leporello-js/leporello-js?tab=readme-ov-file#saving-state-between-page-reloads
+  // Get initial state from Leporello storage
+  state = globalThis.leporello.storage.get('state')
+}
+
 export const createApp = initial => {
-  /* if state is already initialized then preserve it */
+  /* if state was loaded from Leporello storage then keep it,
+   * otherwise initialize with initial state */
   state = state ?? initial.initialState
   component = initial.component
   root = initial.root 
@@ -12,6 +19,10 @@ export const createApp = initial => {
 
 export const handler = fn => (...args) => {
   state = fn(state, ...args)
+  if(globalThis.leporello) {
+    // Save state to Leporello storage to load it after page reload
+    globalThis.leporello.storage.set('state', state)
+  }
   do_render()
 }