Function extendsPostcss

packages/craco/src/lib/features/webpack/style/postcss.ts:48–94

(
  match: CompleteLoader,
  { postcss: postcssOptions }: CracoStyleConfig
)

}

function extendsPostcss(
  match: CompleteLoader,
  { postcss: postcssOptions }: CracoStyleConfig
) {
  const { plugins, env } = postcssOptions ?? {};
  if (isArray(plugins) || env) {
    let postcssPlugins: any[];

    if (env) {
      const mergedPreset = deepMergeWithArray({}, CRA_PRESET_ENV, env);
      postcssPlugins = CRA_PLUGINS(mergedPreset);

      log('Merged PostCSS env preset.');
    } else {
      let craPlugins: any[] = [];

      if (!isString(match.loader.options)) {
        const options = match.loader.options?.postcssOptions;
        if (isFunction(options)) {
          craPlugins = options().plugins;
        } else {
          craPlugins = options?.plugins;
        }
      }

      postcssPlugins = craPlugins || [];
    }

    if (plugins) {
      postcssPlugins = isFunction(plugins)
        ? plugins(postcssPlugins)
        : postcssPlugins.concat(plugins);

      log('Added PostCSS plugins.');
    }

    if (match.loader.options && !isString(match.loader.options)) {
      if (match.loader.options.postcssOptions) {
        match.loader.options.postcssOptions.plugins = () => postcssPlugins;
      } else {
        match.loader.options.postcssOptions = {
          plugins: () => postcssPlugins,
        };
      }
    }
  }
}

function applyLoaderOptions(
  match: CompleteLoader,