Function transform

packages/react-router-dev/vite/plugin.ts:1489–1493

(code, id)

        await viteChildCompiler.pluginContainer.buildStart({});
      },
      async transform(code, id) {
        if (isCssModulesFile(id)) {
          cssModulesManifest[id] = code;
        }
      },
      async configureServer(viteDevServer) {
        setDevServerHooks({
          // Give the request handler access to the critical CSS in dev to avoid a