Same name and namespace in other branches
  1. 10 core/lib/Drupal/Core/Render/theme.api.php \hook_js_alter()
  2. 7.x modules/system/system.api.php \hook_js_alter()
  3. 9 core/lib/Drupal/Core/Render/theme.api.php \hook_js_alter()

Perform necessary alterations to the JavaScript before it is presented on the page.

Parameters

$javascript: An array of all JavaScript being presented on the page.

\Drupal\Core\Asset\AttachedAssetsInterface $assets: The assets attached to the current response.

See also

drupal_js_defaults()

\Drupal\Core\Asset\AssetResolver

Related topics

Hooks
Define functions that alter the behavior of Drupal core.
2 functions implement hook_js_alter()

Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

locale_js_alter in core/modules/locale/locale.module
Implements hook_js_alter().
simpletest_js_alter in core/modules/simpletest/simpletest.module
Implements hook_js_alter().
1 invocation of hook_js_alter()
AssetResolver::getJsAssets in core/lib/Drupal/Core/Asset/AssetResolver.php
Returns the JavaScript assets for the current response's libraries.

File

core/lib/Drupal/Core/Render/theme.api.php, line 846
Hooks and documentation related to the theme and render system.

Code

function hook_js_alter(&$javascript, \Drupal\Core\Asset\AttachedAssetsInterface $assets) {

  // Swap out jQuery to use an updated version of the library.
  $javascript['core/assets/vendor/jquery/jquery.min.js']['data'] = drupal_get_path('module', 'jquery_update') . '/jquery.js';
}