4.7.x common.inc drupal_add_js($file, $nocache = FALSE)
5.x common.inc drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE)
6.x common.inc drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE, $preprocess = TRUE)
7.x common.inc drupal_add_js($data = NULL, $options = NULL)

Add a JavaScript file, setting or inline code to the page.

The behavior of this function depends on the parameters it is called with. Generally, it handles the addition of JavaScript to the page, either as reference to an existing file or as inline code. The following actions can be performed using this function:

  • Add a file ('core', 'module' and 'theme'): Adds a reference to a JavaScript file to the page. JavaScript files are placed in a certain order, from 'core' first, to 'module' and finally 'theme' so that files, that are added later, can override previously added files with ease.
  • Add inline JavaScript code ('inline'): Executes a piece of JavaScript code on the current page by placing the code directly in the page. This can, for example, be useful to tell the user that a new message arrived, by opening a pop up, alert box etc.
  • Add settings ('setting'): Adds a setting to Drupal's global storage of JavaScript settings. Per-page settings are required by some modules to function properly. The settings will be accessible at Drupal.settings.

Parameters

$data: (optional) If given, the value depends on the $type parameter:

  • 'core', 'module' or 'theme': Path to the file relative to base_path().
  • 'inline': The JavaScript code that should be placed in the given scope.
  • 'setting': An array with configuration options as associative array. The array is directly placed in Drupal.settings. You might want to wrap your actual configuration settings in another variable to prevent the pollution of the Drupal.settings namespace.

$type: (optional) The type of JavaScript that should be added to the page. Allowed values are 'core', 'module', 'theme', 'inline' and 'setting'. You can, however, specify any value. It is treated as a reference to a JavaScript file. Defaults to 'module'.

$scope: (optional) The location in which you want to place the script. Possible values are 'header' and 'footer' by default. If your theme implements different locations, however, you can also use these.

$defer: (optional) If set to TRUE, the defer attribute is set on the <script> tag. Defaults to FALSE. This parameter is not used with $type == 'setting'.

$cache: (optional) If set to FALSE, the JavaScript file is loaded anew on every page call, that means, it is not cached. Defaults to TRUE. Used only when $type references a JavaScript file.

Return value

If the first parameter is NULL, the JavaScript array that has been built so far for $scope is returned.

Related topics

9 calls to drupal_add_js()
color_scheme_form in modules/color/color.module
Form callback. Returns the configuration form.
drupal_get_js in includes/common.inc
Returns a themed presentation of all JavaScript code for the current page. References to JavaScript files are placed in a certain order: first, all 'core' files, then all 'module' and finally all 'theme' JavaScript…
theme_fieldset in includes/form.inc
Format a group of form items.
theme_table_select_header_cell in includes/theme.inc
Returns a header cell for tables that have a select all functionality.
theme_textarea in includes/form.inc
Format a textarea.

... See full list

File

includes/common.inc, line 1760
Common functions that many Drupal modules will need to reference.

Code

function drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE) {
  if (!is_null($data)) {
    _drupal_add_js('misc/jquery.js', 'core', 'header', FALSE, $cache);
    _drupal_add_js('misc/drupal.js', 'core', 'header', FALSE, $cache);
  }
  return _drupal_add_js($data, $type, $scope, $defer, $cache);
}