title: React color ChromePicker alpha slider does not work. Is required use Alpha individual API?
body: <p>Im trying to implement react-color from <a href="https://casesandberg.github.io/react-color/#examples" rel="noreferrer">https://casesandberg.github.io/react-color/#examples</a>
  I'm using the ChromePicker component, but the Alpha slider is not working, as expected.
  The slider bar is working, but the slider bullet is not moving on.</p>
  
  <p>Here is the <a href="https://codesandbox.io/s/react-color-nkh7w" rel="noreferrer">https://codesandbox.io/s/react-color-nkh7w</a> example. Is there any component missing?</p>