feat: 🎸 add useUpdate hook

Author: streamich

README.md

@@ -54,6 +54,7 @@
   - [`useSpring`](./docs/useSpring.md) — interpolates number over time according to spring dynamics.
   - [`useTimeout`](./docs/useTimeout.md) — returns true after a timeout.
   - [`useTween`](./docs/useTween.md) — re-renders component, while tweening a number from 0 to 1. [![][img-demo]](https://codesandbox.io/s/52990wwzyl)
+  - [`useUpdate`](./docs/useUpdate.md) — returns a callback, which re-renders component when called.
     <br/>
     <br/>
 - [**Side-effects**](./docs/Side-effects.md)

docs/useUpdate.md

@@ -0,0 +1,21 @@
+# `useUpdate`
+
+React utility hook that returns a function that forces component
+to re-render when called.
+
+
+## Usage
+
+```jsx
+import {useUpdate} from 'react-use';
+
+const Demo = () => {
+  const update = useUpdate();
+  return (
+    <>
+      <div>Time: {Date.now()}</div>
+      <button onClick={update}>Update</button>
+    </>
+  );
+};
+```

src/__stories__/useUpdate.story.tsx

@@ -0,0 +1,21 @@
+import {storiesOf} from '@storybook/react';
+import * as React from 'react';
+import {useUpdate} from '..';
+import ShowDocs from '../util/ShowDocs';
+
+const Demo = () => {
+  const update = useUpdate();
+  return (
+    <>
+      <div>Time: {Date.now()}</div>
+      <button onClick={update}>Update</button>
+    </>
+  );
+};
+
+storiesOf('useUpdate', module)
+  .add('Docs', () => <ShowDocs md={require('../../docs/useUpdate.md')} />)
+  .add('Demo', () =>
+    <Demo/>
+  )
+

src/index.ts

@@ -31,6 +31,7 @@ import useTitle from './useTitle';
 import useToggle from './useToggle';
 import useTween from './useTween';
 import useUnmount from './useUnmount';
+import useUpdate from './useUpdate';
 import useWindowSize from './useWindowSize';
 
 export {
@@ -67,5 +68,6 @@ export {
   useToggle,
   useTween,
   useUnmount,
+  useUpdate,
   useWindowSize,
 };

src/useUpdate.ts

@@ -0,0 +1,5 @@
+import {useState} from './react';
+
+const useUpdate = () => useState(0)[1] as (() => void);
+
+export default useUpdate;