Rename .js/.jsx to .ts/.tsx

src/content/reducers/addon.ts

@@ -0,0 +1,15 @@
+import actions from 'content/actions';
+
+const defaultState = {
+  enabled: true,
+};
+
+export default function reducer(state = defaultState, action = {}) {
+  switch (action.type) {
+  case actions.ADDON_SET_ENABLED:
+    return { ...state,
+      enabled: action.enabled, };
+  default:
+    return state;
+  }
+}