What problem does this feature solve?

For Vue3, useCssModule can only be called in setup. For Vue2, $style can only be accessed by instance.

Sometimes i want to use css module in SFC but outside instance scope, such as:

// component.vue
<script>
export function someExportedFn() {
  // how can i get css module here?
}
</script>

I don't think technically this should be prevented, css module should be accessible from anywhere in SFC.

What does the proposed API look like?

I haven't found a perfect solution yet. It seems use loader to resolve the problem is a feasible way.

If this CSS module needs to be accessible to external code, why place it in the component? You can just move it to an external *.module.css file which can then be imported anywhere.

I think this use case is to niche to warrant a dedicated API, and there is an obvious workaround.