Custom styling not working.

[vuphuctho]

Demo: https://codesandbox.io/s/7w9orrrmw1

Since the npm version does not support custom styling, I directly use the version in master branch of your Github. However, the prop selectClassName is not passed to the component, and hence I cannot make any styling customization.

Strangely, when I directly make a copy the component and keep it locally, the styling works. Demo: https://codesandbox.io/s/o7m93419oq

For some reason, the styling does not appear in my demos. But you can check the browser console to see the class. My apology for the inconvenient.