1 common.inc backdrop_add_library($module, $name, $every_page = NULL)

Adds multiple JavaScript or CSS files at the same time.

A library defines a set of JavaScript and/or CSS files, optionally using settings, and optionally requiring another library. For example, a library can be a jQuery plugin, a JavaScript framework, or a CSS framework. This function allows modules to load a library defined/shipped by itself or a depending module, without having to add all files of the library separately. Each library is only loaded once.


$module: The name of the module that registered the library.

$name: The name of the library to add.

$every_page: Set to TRUE if this library is added to every page on the site. Only items with the every_page flag set to TRUE can participate in aggregation.

Return value

TRUE if the library was successfully added; FALSE if the library or one of: its dependencies could not be added.

See also





core/includes/common.inc, line 5388
Common functions that many Backdrop modules will need to reference.


function backdrop_add_library($module, $name, $every_page = NULL) {
  $added = &backdrop_static(__FUNCTION__, array());

  // Only process the library if it exists and it was not added already.
  if (!isset($added[$module][$name])) {
    if ($library = backdrop_get_library($module, $name)) {
      // Add all components within the library.
      $elements['#attached'] = array(
        'library' => $library['dependencies'],
        'js' => $library['js'],
        'css' => $library['css'],
      $added[$module][$name] = backdrop_process_attached($elements, JS_LIBRARY, TRUE, $every_page);
    else {
      // Requested library does not exist.
      $added[$module][$name] = FALSE;

  return $added[$module][$name];