Function loadCssContents

packages/react-router-dev/vite/plugin.ts:1166–1190

(viteDevServer, dep)

  };

  const loadCssContents: LoadCssContents = async (viteDevServer, dep) => {
    invariant(
      viteCommand === "serve",
      "loadCssContents is only available in dev mode",
    );

    if (dep.file && isCssModulesFile(dep.file)) {
      return cssModulesManifest[dep.file];
    }

    let transformedCssCode = (await viteDevServer.transformRequest(dep.url))
      ?.code;
    invariant(
      transformedCssCode,
      `Failed to load CSS for ${dep.file ?? dep.url}`,
    );

    let cssString = getCssStringFromViteDevModuleCode(transformedCssCode);
    invariant(
      typeof cssString === "string",
      `Failed to extract CSS for ${dep.file ?? dep.url}`,
    );

    return cssString;
  };

  return [
    {