feat: add useWait hook

Author: f

README.md

@@ -51,6 +51,7 @@
   - [`useOutsideClick`](./docs/useOutsideClick.md) — triggers callback when user clicks outside target area.
   - [`useSpeech`](./docs/useSpeech.md) — synthesizes speech from a text string. [![][img-demo]](https://codesandbox.io/s/n090mqz69m)
   - [`useVideo`](./docs/useVideo.md) — plays video, tracks its state, and exposes playback controls.
+  - [`useWait`](./docs/useWait.md) — complex waiting management for UIs.
     <br/>
     <br/>
 - [**Animations**](./docs/Animations.md)

docs/useWait.md

@@ -0,0 +1,36 @@
+# `useWait`
+
+React waiting management hook.
+
+## Usage
+
+```jsx
+import { useWait } from 'react-use'
+
+function UserCreateButton() {
+  const { startWaiting, endWaiting, isWaiting, Wait } = useWait();
+
+  return (
+    <button
+      onClick={() => startWaiting("creating user")}
+      disabled={isWaiting("creating user")}
+    >
+      <Wait message="creating user" waiting={<div>Creating user!</div>}>
+        Create User
+      </Wait>
+    </button>
+  );
+}
+```
+
+And you should wrap your `App` with `Waiter` component. It's actually a `Context.Provider` that provides a loading context to the component tree.
+
+```jsx
+const rootElement = document.getElementById("root");
+ReactDOM.render(
+  <useWait.Waiter>
+    <App />
+  </useWait.Waiter>,
+  rootElement
+);
+```