createUseStyles has access to theme without useTheme being passed

Expected behavior: I had expected that not passing useTheme() to the useStyles() created by createUseStyles() would prevent the theme being available within createUseStyles

Describe the bug: I can access the theme without passing anything to useStyles(). I couldn’t find anything in the documentation that suggested this was intentional, so was hoping to clarify:

• Is this an undocumented feature (in which case this pattern is safe to use)?
• Is this a bug (in which case I should avoid the pattern)?

import { createUseStyles } from "react-jss";

const useStyles = createUseStyles((theme) => ({
  root: {
    border: "5px blue solid",
    borderColor: theme.themeColor // This correctly makes by border `themeColor`
  }
}));

export default function MyComponent({ text, customWidth }) {
  const classes = useStyles();

  return <div className={classes.root}>{text}</div>;
}

Codesandbox link: https://codesandbox.io/s/createusestyles-automagic-theme-detection-8wks4?file=/pages/day/index.js

Versions (please complete the following information):

• jss: (react-jss) 10.4.0
• Browser [e.g. chrome, safari]: chrome
• OS [e.g. Windows, macOS]: macOS Feel free to add any additional versions which you may think are relevant to the bug.

[kof]

I think we could have <ThemeProvider theme={theme} useTheme={true}/> to turn on auto subscription to the theme

[kof]

In any case, please create a separate issue, this discussion didn’t belong here.