@swc/plugin-emotion doesn't support autoLabel option

[cskunkun]

Describe the bug
set autoLabel options always, but it doesn't work in development mode

URL to minimal reproduction

# create a rspack project
npm create rsbuild@latest

// set @swc/plugin-emotion
export default defineConfig({
  plugins: [
    pluginReact({
      swcReactOptions: {
        importSource: '@emotion/react',
      },
    }),
  ],
  tools: {
    swc: {
      jsc: {
        experimental: {
          plugins: [
            [
              '@swc/plugin-emotion',
              {
                autoLabel: 'always',
                sourceMap: true,
              },
            ],
          ],
        },
      },
    },
  },
});

// create a file src/style.ts
import { css } from '@emotion/css';

export const testCls = css`
  font-size: 100px;

  font-weight: bold;
`;

app.tsx

import './App.css';
import * as s from './style';

const App = () => {
  return <div className={s.testCls}>TST</div>;
};

export default App;

package.json dependencies

  "dependencies": {
    "@babel/preset-react": "^7.28.5",
    "@emotion/css": "^11.13.5",
    "@emotion/react": "^11.14.0",
    "react": "^19.2.3",
    "react-dom": "^19.2.3"
  },
  "devDependencies": {
    "@eslint/js": "^9.39.1",
    "@rsbuild/core": "^1.6.14",
    "@rsbuild/plugin-babel": "^1.0.6",
    "@rsbuild/plugin-react": "^1.4.2",
    "@swc/plugin-emotion": "^12.0.0",
    "@types/react": "^19.2.7",
    "@types/react-dom": "^19.2.3",
    "eslint": "^9.39.1",
    "eslint-plugin-react-hooks": "^7.0.1",
    "eslint-plugin-react-refresh": "^0.4.24",
    "globals": "^16.5.0",
    "prettier": "^3.7.3",
    "typescript": "^5.9.3",
    "typescript-eslint": "^8.48.0"
  }

Expected behavior

run npm run dev, find classname is minified, expected xxx-xxx-testCls

[kdy1]

Does it work on production?