Same name and namespace in other branches
  1. 8.9.x core/lib/Drupal/Core/Asset/LibraryDiscoveryInterface.php \Drupal\Core\Asset\LibraryDiscoveryInterface
  2. 9 core/lib/Drupal/Core/Asset/LibraryDiscoveryInterface.php \Drupal\Core\Asset\LibraryDiscoveryInterface

Discovers information for asset (CSS/JavaScript) libraries.

Library information is statically cached. Libraries are keyed by extension for several reasons:

  • Libraries are not unique. Multiple extensions might ship with the same library in a different version or variant. This registry cannot (and does not attempt to) prevent library conflicts.
  • Extensions implementing and thereby depending on a library that is registered by another extension can only rely on that extension's library.
  • Two (or more) extensions can still register the same library and use it without conflicts in case the libraries are loaded on certain pages only.

Hierarchy

Expanded class hierarchy of LibraryDiscoveryInterface

All classes that implement LibraryDiscoveryInterface

File

core/lib/Drupal/Core/Asset/LibraryDiscoveryInterface.php, line 18

Namespace

Drupal\Core\Asset
View source 
interface LibraryDiscoveryInterface {

  /**
   * Gets all libraries defined by an extension.
   *
   * @param string $extension
   *   The name of the extension that registered a library.
   *
   * @return array
   *   An associative array of libraries registered by $extension is returned
   *   (which may be empty).
   *
   * @see self::getLibraryByName()
   */
  public function getLibrariesByExtension($extension);

  /**
   * Gets a single library defined by an extension by name.
   *
   * @param string $extension
   *   The name of the extension that registered a library.
   * @param string $name
   *   The name of a registered library to retrieve.
   *
   * @return array|false
   *   The definition of the requested library, if $name was passed and it
   *   exists, otherwise FALSE.
   */
  public function getLibraryByName($extension, $name);

  /**
   * Clears static and persistent library definition caches.
   */
  public function clearCachedDefinitions();

}

Members

Namesort descending Modifiers Type Description Overrides
LibraryDiscoveryInterface::clearCachedDefinitions public function Clears static and persistent library definition caches.
LibraryDiscoveryInterface::getLibrariesByExtension public function Gets all libraries defined by an extension.
LibraryDiscoveryInterface::getLibraryByName public function Gets a single library defined by an extension by name.