themePath is not flexible

[rikuson]

trafficstars

I followed README like this.

render(
    <Provider store={store}>
      <ThemeSwitcher themePath="/themes" defaultTheme="yeti">
        <Router history={history} routes={routes} />
      </ThemeSwitcher>
    </Provider>, document.getElementById('app')
);

Then it worked with using web server.
But it doesn't work when I use file protocol by doing double click html file.
It's not common usage, but it happened to me in GitHub Pages.

If I change the themePath into theme or ./theme, it works.

[rikuson]

theme didn't work in a sub directory.