1 files changed, 38 insertions, 2 deletions

diff --git a/js/seed/src/app.js b/js/seed/src/app.js
index 5fd577c..34b4579 100644
--- a/js/seed/src/app.js
+++ b/js/seed/src/app.js
@@ -5,9 +5,11 @@ import { initialState, cloneState } from './state.js';
 import { update } from './update.js';
 import { view } from './view.js';
 import { fetchPokemon } from './api.js';
+import { initDevMode } from './dev.js';
 
 const root = document.getElementById('app');
 let state = cloneState(initialState);
+let dev;
 
 /**
  * Entrypoint for the app.
@@ -90,6 +92,7 @@ function dispatch(action) {
   const prevState = state;
   state = update(state, action);
   if (devMode) {
+    dev.pushState(state);
     console.groupCollapsed(`Action: ${action.type}`);
     console.log('Payload:', action.payload);
     console.log('Prev state:', prevState);
@@ -111,7 +114,7 @@ function handleInput(e) {
 /**
  * Handles form submission, triggers async fetch, and dispatches state updates.
  *
- * Why handle async here? Keeps update/view pure and side-effect free, following functional programming best practices.
+ * Why handle async here? Keeps update/view pure and centralizes side-effect.
  */
 async function handleSubmit(e) {
   e.preventDefault();
@@ -126,4 +129,37 @@ async function handleSubmit(e) {
 }
 
 // Initial render
-doRender(); 
\ No newline at end of file
+doRender();
+
+// After devMode is set
+if (devMode) {
+  dev = initDevMode({
+    getState: () => state,
+    setState: s => { state = s; },
+    render: doRender
+  });
+}
+
+function updateHistoryInfo() {
+  if (!devMode || !dev) return;
+  dev.update();
+}
+
+function setHistoryPointer(idx) {
+  const info = dev.getHistoryInfo();
+  if (idx < 1 || idx > info.length) return;
+  const newState = dev.setPointer(idx - 1);
+  if (newState) {
+    state = newState;
+    doRender();
+    updateHistoryInfo();
+  }
+}
+
+function handleSliderChange(e) {
+  setHistoryPointer(Number(e.target.value));
+}
+
+function handleStepperChange(e) {
+  setHistoryPointer(Number(e.target.value));
+} 
\ No newline at end of file