TypeScript cssnano.default函数代码示例

  const postcssPluginCreator = function() {
    return [
      autoprefixer(),
      postcssUrl({
        url: (URL: string) => {
          // Only convert root relative URLs, which CSS-Loader won't process into require().
          if (!URL.startsWith('/') || URL.startsWith('//')) {
            return URL;
          }

          if (deployUrl.match(/:\/\//)) {
            // If deployUrl contains a scheme, ignore baseHref use deployUrl as is.
            return `${deployUrl.replace(/\/$/, '')}${URL}`;
          } else if (baseHref.match(/:\/\//)) {
            // If baseHref contains a scheme, include it as is.
            return baseHref.replace(/\/$/, '') +
                `/${deployUrl}/${URL}`.replace(/\/\/+/g, '/');
          } else {
            // Join together base-href, deploy-url and the original URL.
            // Also dedupe multiple slashes into single ones.
            return `/${baseHref}/${deployUrl}/${URL}`.replace(/\/\/+/g, '/');
          }
        }
      })
    ].concat(
        minimizeCss ? [cssnano({ safe: true, autoprefixer: false })] : []
    );
  };

  const postcssPluginCreator = function() {
    // safe settings based on: https://github.com/ben-eb/cssnano/issues/358#issuecomment-283696193
    const importantCommentRe = /@preserve|@licen[cs]e|[@#]\s*source(?:Mapping)?URL|^!/i;
    const minimizeOptions = {
      autoprefixer: false, // full pass with autoprefixer is run separately
      safe: true,
      mergeLonghand: false, // version 3+ should be safe; cssnano currently uses 2.x
      discardComments : { remove: (comment: string) => !importantCommentRe.test(comment) }
    };

    return [
      postcssUrl([
        {
          // Only convert root relative URLs, which CSS-Loader won't process into require().
          filter: ({ url }: { url: string }) => url.startsWith('/') && !url.startsWith('//'),
          url: ({ url }: { url: string }) => {
            if (deployUrl.match(/:\/\//) || deployUrl.startsWith('/')) {
              // If deployUrl is absolute or root relative, ignore baseHref & use deployUrl as is.
              return `${deployUrl.replace(/\/$/, '')}${url}`;
            } else if (baseHref.match(/:\/\//)) {
              // If baseHref contains a scheme, include it as is.
              return baseHref.replace(/\/$/, '') +
                  `/${deployUrl}/${url}`.replace(/\/\/+/g, '/');
            } else {
              // Join together base-href, deploy-url and the original URL.
              // Also dedupe multiple slashes into single ones.
              return `/${baseHref}/${deployUrl}/${url}`.replace(/\/\/+/g, '/');
            }
          }
        },
        {
          // TODO: inline .cur if not supporting IE (use browserslist to check)
          filter: (asset: any) => !asset.hash && !asset.absolutePath.endsWith('.cur'),
          url: 'inline',
          // NOTE: maxSize is in KB
          maxSize: 10
        }
      ]),
      autoprefixer(),
      customProperties({ preserve: true })
    ].concat(
        minimizeCss ? [cssnano(minimizeOptions)] : []
    );
  };

  const postcssPluginCreator = function() {
    // safe settings based on: https://github.com/ben-eb/cssnano/issues/358#issuecomment-283696193
    const importantCommentRe = /@preserve|@license|[@#]\s*source(?:Mapping)?URL|^!/i;
    const minimizeOptions = {
      autoprefixer: false, // full pass with autoprefixer is run separately
      safe: true,
      mergeLonghand: false, // version 3+ should be safe; cssnano currently uses 2.x
      discardComments : { remove: (comment: string) => !importantCommentRe.test(comment) }
    };

    return [
      postcssUrl({
        url: (URL: string) => {
          // Only convert root relative URLs, which CSS-Loader won't process into require().
          if (!URL.startsWith('/') || URL.startsWith('//')) {
            return URL;
          }

          if (deployUrl.match(/:\/\//)) {
            // If deployUrl contains a scheme, ignore baseHref use deployUrl as is.
            return `${deployUrl.replace(/\/$/, '')}${URL}`;
          } else if (baseHref.match(/:\/\//)) {
            // If baseHref contains a scheme, include it as is.
            return baseHref.replace(/\/$/, '') +
                `/${deployUrl}/${URL}`.replace(/\/\/+/g, '/');
          } else {
            // Join together base-href, deploy-url and the original URL.
            // Also dedupe multiple slashes into single ones.
            return `/${baseHref}/${deployUrl}/${URL}`.replace(/\/\/+/g, '/');
          }
        }
      }),
      autoprefixer(),
      customProperties({ preserve: true})
    ].concat(
        minimizeCss ? [cssnano(minimizeOptions)] : []
    );
  };

export function getStylesConfig(wco: WebpackConfigOptions) {
  const { projectRoot, buildOptions, appConfig } = wco;

  const appRoot = path.resolve(projectRoot, appConfig.root);
  const entryPoints: { [key: string]: string[] } = {};
  const globalStylePaths: string[] = [];
  const extraPlugins: any[] = [];
  // style-loader does not support sourcemaps without absolute publicPath, so it's
  // better to disable them when not extracting css
  // https://github.com/webpack-contrib/style-loader#recommended-configuration
  const cssSourceMap = buildOptions.extractCss && buildOptions.sourcemap;

  // Minify/optimize css in production.
  const cssnanoPlugin = cssnano({ safe: true, autoprefixer: false });

  // Convert absolute resource URLs to account for base-href and deploy-url.
  const baseHref = wco.buildOptions.baseHref;
  const deployUrl = wco.buildOptions.deployUrl;
  const postcssUrlOptions = {
    url: (URL: string) => {
      // Only convert absolute URLs, which CSS-Loader won't process into require().
      if (!URL.startsWith('/')) {
        return URL;
      }
      // Join together base-href, deploy-url and the original URL.
      // Also dedupe multiple slashes into single ones.
      return `/${baseHref || ''}/${deployUrl || ''}/${URL}`.replace(/\/\/+/g, '/');
    }
  };
  const urlPlugin = postcssUrl(postcssUrlOptions);
  // We need to save baseHref and deployUrl for the Ejected webpack config to work (we reuse
  //  the function defined above).
  (postcssUrlOptions as any).baseHref = baseHref;
  (postcssUrlOptions as any).deployUrl = deployUrl;
  // Save the original options as arguments for eject.
  urlPlugin[postcssArgs] = postcssUrlOptions;

  // PostCSS plugins.
  const postCssPlugins = [autoprefixer(), urlPlugin].concat(
    buildOptions.target === 'production' ? [cssnanoPlugin] : []
  );

  // determine hashing format
  const hashFormat = getOutputHashFormat(buildOptions.outputHashing);

  // use includePaths from appConfig
  const includePaths: string[] = [];

  if (appConfig.stylePreprocessorOptions
    && appConfig.stylePreprocessorOptions.includePaths
    && appConfig.stylePreprocessorOptions.includePaths.length > 0
  ) {
    appConfig.stylePreprocessorOptions.includePaths.forEach((includePath: string) =>
      includePaths.push(path.resolve(appRoot, includePath)));
  }

  // process global styles
  if (appConfig.styles.length > 0) {
    const globalStyles = extraEntryParser(appConfig.styles, appRoot, 'styles');
    // add style entry points
    globalStyles.forEach(style =>
      entryPoints[style.entry]
        ? entryPoints[style.entry].push(style.path)
        : entryPoints[style.entry] = [style.path]
    );
    // add global css paths
    globalStylePaths.push(...globalStyles.map((style) => style.path));
  }

  // set base rules to derive final rules from
  const baseRules = [
    { test: /\.css$/, loaders: [] },
    { test: /\.scss$|\.sass$/, loaders: ['sass-loader'] },
    { test: /\.less$/, loaders: ['less-loader'] },
    // stylus-loader doesn't support webpack.LoaderOptionsPlugin properly,
    // so we need to add options in its query
    {
      test: /\.styl$/, loaders: [`stylus-loader?${JSON.stringify({
        sourceMap: cssSourceMap,
        paths: includePaths
      })}`]
    }
  ];

  const commonLoaders = [
    // css-loader doesn't support webpack.LoaderOptionsPlugin properly,
    // so we need to add options in its query
    `css-loader?${JSON.stringify({ sourceMap: cssSourceMap, importLoaders: 1 })}`,
    'postcss-loader'
  ];

  // load component css as raw strings
  let rules: any = baseRules.map(({test, loaders}) => ({
    exclude: globalStylePaths, test, loaders: [
      'exports-loader?module.exports.toString()',
      ...commonLoaders,
      ...loaders
    ]
  }));

//.........这里部分代码省略.........

export function getStylesConfig(wco: WebpackConfigOptions) {
  const { projectRoot, buildOptions, appConfig } = wco;

  const appRoot = path.resolve(projectRoot, appConfig.root);
  const entryPoints: { [key: string]: string[] } = {};
  const globalStylePaths: string[] = [];
  const extraPlugins: any[] = [];
  // style-loader does not support sourcemaps without absolute publicPath, so it's
  // better to disable them when not extracting css
  // https://github.com/webpack-contrib/style-loader#recommended-configuration
  const cssSourceMap = buildOptions.extractCss && buildOptions.sourcemap;

  // minify/optimize css in production
  // autoprefixer is always run separately so disable here
  const extraPostCssPlugins = buildOptions.target === 'production'
    ? [cssnano({ safe: true, autoprefixer: false })]
    : [];

  // determine hashing format
  const hashFormat = getOutputHashFormat(buildOptions.outputHashing);

  // use includePaths from appConfig
  const includePaths: string[] = [];

  if (appConfig.stylePreprocessorOptions
    && appConfig.stylePreprocessorOptions.includePaths
    && appConfig.stylePreprocessorOptions.includePaths.length > 0
  ) {
    appConfig.stylePreprocessorOptions.includePaths.forEach((includePath: string) =>
      includePaths.push(path.resolve(appRoot, includePath)));
  }

  // process global styles
  if (appConfig.styles.length > 0) {
    const globalStyles = extraEntryParser(appConfig.styles, appRoot, 'styles');
    // add style entry points
    globalStyles.forEach(style =>
      entryPoints[style.entry]
        ? entryPoints[style.entry].push(style.path)
        : entryPoints[style.entry] = [style.path]
    );
    // add global css paths
    globalStylePaths.push(...globalStyles.map((style) => style.path));
  }

  // set base rules to derive final rules from
  const baseRules = [
    { test: /\.css$/, loaders: [] },
    { test: /\.scss$|\.sass$/, loaders: ['sass-loader'] },
    { test: /\.less$/, loaders: ['less-loader'] },
    // stylus-loader doesn't support webpack.LoaderOptionsPlugin properly,
    // so we need to add options in its query
    {
      test: /\.styl$/, loaders: [`stylus-loader?${JSON.stringify({
        sourceMap: cssSourceMap,
        paths: includePaths
      })}`]
    }
  ];

  const commonLoaders = ['postcss-loader'];

  // load component css as raw strings
  let rules: any = baseRules.map(({test, loaders}) => ({
    exclude: globalStylePaths, test, loaders: ['raw-loader', ...commonLoaders, ...loaders]
  }));

  // load global css as css files
  if (globalStylePaths.length > 0) {
    rules.push(...baseRules.map(({test, loaders}) => ({
      include: globalStylePaths, test, loaders: ExtractTextPlugin.extract({
        use: [
          // css-loader doesn't support webpack.LoaderOptionsPlugin properly,
          // so we need to add options in its query
          `css-loader?${JSON.stringify({ sourceMap: cssSourceMap })}`,
          ...commonLoaders,
          ...loaders
        ],
        fallback: 'style-loader',
        // publicPath needed as a workaround https://github.com/angular/angular-cli/issues/4035
        publicPath: ''
      })
    })));
  }

  // supress empty .js files in css only entry points
  if (buildOptions.extractCss) {
    extraPlugins.push(new SuppressExtractedTextChunksWebpackPlugin());
  }

  return {
    entry: entryPoints,
    module: { rules },
    plugins: [
      // extract global css from js files into own css file
      new ExtractTextPlugin({
        filename: `[name]${hashFormat.extract}.bundle.css`,
        disable: !buildOptions.extractCss
      }),
      new webpack.LoaderOptionsPlugin({
//.........这里部分代码省略.........