generateClassName prefix not working in Production

[vinayg-cp]

Expected behavior:
When using the generateClassName function in production. We expect the stylesheet.options to be populated with appropriate meta data and classNames.
As a result all the class names are prefixed with undefined,

Describe the bug:

Class names are undefined:

In contrast in development it works fine:

And it is prefixed with appropriate class name in development mode.

The stylesheet options is not populated and instead it is undefined.

Codesandbox link:
Please create a codesandbox.io with the issue. Make it as minimal as possible as this will help us find the bug quicker.
Unfortunately it happens only in production and not in development.
So I doubt in codesandbox it will be exactly reproducible.

Versions (please complete the following information):

• jss: 8.6.1
• Browser [e.g. chrome, safari]: Chrome 72+
• OS [e.g. Windows, macOS]: Windows, Linux

Code Snippets:

[kof]

Without some reproduction we won't have any prio on this. It should be possible to use production mode on codesandbox.

[vinayg-cp]

Noted will try to provide a minimal reproducible code on codesandbox.io

[HenriBeck]

The issue is that we pass undefined in production here. You shouldn't expect to have a classNamePrefix on the stylesheets options (typings is located here).

In v10 we replaced undefined with an empty string.

[vinayg-cp]

The issue is that we pass undefined in production here. You shouldn't expect to have a classNamePrefix on the stylesheets options (typings is located here).

In v10 we replaced undefined with an empty string.

Hi,

Then where should we expect classPrefix to be present in production?

[HenriBeck]

Not at all, classNamePrefix can also be undefined in development (though that's not the case for react-jss)

[micaste]

@kof I have some reproduction for this.

This code sandbox has a small react-jss setup using the following example:

const jss = create(preset());
...
<JssProvider classNamePrefix="test-prefix" jss={jss}>
...

Link to the sandbox: https://codesandbox.io/s/react-jss-playground-0e14b
In dev mode, the classnames look like test-prefixComp-title-0-2-2.

In prod mode, the classnames look like test-prefixundefined022.
Link to the code deployed in production mode: https://csb-0e14b.netlify.com/

[micaste]

Actually I found that this was fixed in #901. I understand that there is no point backporting the fix