perf: replace useState with useReducer

src/use-force-update.ts

@@ -1,21 +1,14 @@
-import { useState } from 'react';
+import { useReducer } from 'react';
 
-interface VoidFunction {
-  (): void;
-}
+type VoidFunction = () => void;
+type VoidFunctionCreator = () => VoidFunction;
+type ToggleReducer = (state: boolean, action: void) => boolean;
 
-interface VoidFunctionCreator {
-  (): VoidFunction;
-}
+const reducer: ToggleReducer = state => !state;
 
-const toggle = (state: boolean): boolean => !state;
-
-const useForceUpdate: VoidFunctionCreator = (): VoidFunction => {
-  const [ , setState ] = useState<boolean>(true);
-  const forceUpdate: VoidFunction = (): void => {
-    setState(toggle);
-  };
-  return forceUpdate;
+const useForceUpdate: VoidFunctionCreator = () => {
+  const [, dispatch] = useReducer(reducer, true);
+  return dispatch as VoidFunction;
 };
 
 export default useForceUpdate;

tests/use-force-update.spec.tsx

@@ -31,4 +31,10 @@ describe('useForceUpdate', () => {
     expect(renders).to.equal(2);
   });
 
+  it('update function should return undefined', () => {
+    expect(forceUpdate()).to.be.undefined;
+    // @ts-ignore test with parameters :shrug:
+    expect(forceUpdate('anything')).to.be.undefined;
+  });
+
 });