initialState

src/Updux.ts

@@ -1 +1,17 @@
-export default class Updux { }
+export default class Updux<T_Local_State = Record<any, any>> {
+    #local_initial: T_Local_State;
+
+    constructor(
+        config: Partial<{
+            initial: T_Local_State;
+        }>,
+    ) {
+        // TODO test that we default to {}
+        this.#local_initial = config.initial ?? ({} as T_Local_State);
+    }
+
+    // TODO memoize?
+    get initial() {
+        return this.#local_initial;
+    }
+}

src/initial.test.ts

@@ -0,0 +1,15 @@
+import Updux from './Updux.js';
+
+test('default', () => {
+    const { initial } = new Updux({});
+
+    expect(initial).toBeTypeOf('object');
+    expect(initial).toEqual({});
+});
+
+test('number', () => {
+    const { initial } = new Updux({ initial: 3 });
+
+    expect(initial).toBeTypeOf('number');
+    expect(initial).toEqual(3);
+});