initial commit

src/popup/popup.js

@@ -0,0 +1,19 @@
+/**
+ * popup.js — UI logic for the extension popup.
+ * Runs inside the popup iframe; uses chrome.runtime / chrome.storage APIs.
+ */
+
+const actionBtn = document.getElementById('action-btn');
+const statusEl = document.getElementById('status');
+
+actionBtn.addEventListener('click', async () => {
+  // TODO: replace with actual extension logic
+  try {
+    const result = await chrome.storage.local.get(['counter']);
+    const count = (result.counter ?? 0) + 1;
+    await chrome.storage.local.set({ counter: count });
+    statusEl.textContent = `Clicked ${count} time${count === 1 ? '' : 's'}`;
+  } catch (err) {
+    statusEl.textContent = `Error: ${err.message}`;
+  }
+});