function d_common_libraries_info() {
  global $conf;
  return [
    'webcomponentsjs' => [
      'name' => 'webcomponents',
      'vendor url' => 'http://polymer-project.org',
      'download url' => 'https://github.com/Polymer/polymer',
      'version arguments' => [
        'file' => 'webcomponents.js',
        'pattern' => '/@version (\d\.\d\.\d)/',
      ],
      'files' => [
        'js' => [
          'webcomponents.min.js' => [
            'type' => 'file',
            'scope' => 'header',
            'group' => JS_LIBRARY,
            'every_page' => TRUE,
            'weight' => -100
          ],
          'polymer_components' => [
            'type' => 'inline',
            'scope' => 'header',
            'group' => JS_LIBRARY,
            'every_page' => TRUE,
            'weight' => 100,
            'data' => <<<SCRIPT
document.write('<link href="/{$conf['components_path']}/{$conf['components_file']}" rel="import" />');
SCRIPT
          ]
        ],
      ],
      'callbacks' => [
//        'post-load' => ['_polymer_load_components']
      ],
    ],
  ];
}