pluginVirtualModule({
  virtualModules: {
    'virtual-json-list': async ({ addDependency, addContextDependency }) => {
      const jsonFolderPath = join(__dirname, 'json');
      const ls = await readdir(jsonFolderPath);
      addContextDependency(jsonFolderPath);
      const res: Record<string, unknown> = {};
      for (const file of ls) {
        if (file.endsWith('.json')) {
          const jsonFilePath = join(jsonFolderPath, file);
          const jsonContent = await readFile(jsonFilePath, 'utf-8');
          addDependency(jsonFilePath);
          res[file] = JSON.parse(jsonContent);
        }
      }
      return `export default ${JSON.stringify(res)}`;
    },
  },
});

import jsonList from 'virtual-json-list';
console.log(jsonList);