title: import Event Types from React (TypeScript)
body: <p>How to import Event Types from React?</p>
  
  <p>For an example how to import KeyboardEvent so it can be used for onKeyDown callback type annotation?</p>
  
  <p>I have browsed Material-ui .d.ts file and found that in that file EventTypes are used as defined in React</p>
  
  <pre><code>onKeyDown?: React.KeyboardEventHandler;
  </code></pre>
  
  <p>And in React .d.ts</p>
  
  <pre><code>type KeyboardEventHandler = EventHandler&lt;KeyboardEvent&gt;;
  </code></pre>
  
  <p>But I can't find a way to use import them ...</p>