wp_add_inline_script( string $handle, string $data, string $position = 'after' ): bool

Adds extra code to a registered script.


Code will only be added if the script is already in the queue.
Accepts a string $data containing the code. If two or more code blocks are added to the same script $handle, they will be printed in the order they were added, i.e. the latter added code can redeclare the previous.

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See also

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$handle string Required
Name of the script to add the inline script to.
$data string Required
String containing the JavaScript to be added.
$position string Optional
Whether to add the inline script before the handle or after. Default 'after'.

Default: 'after'

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bool True on success, false on failure.

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File: wp-includes/functions.wp-scripts.php. View all references

function wp_add_inline_script( $handle, $data, $position = 'after' ) {
	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );

	if ( false !== stripos( $data, '</script>' ) ) {
				/* translators: 1: <script>, 2: wp_add_inline_script() */
				__( 'Do not pass %1$s tags to %2$s.' ),
		$data = trim( preg_replace( '#<script[^>]*>(.*)</script>#is', '$1', $data ) );

	return wp_scripts()->add_inline_script( $handle, $data, $position );

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Version Description
4.5.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    Contributed by Jules Colle

    Apparently we should now use wp_add_inline_script instead of wp_localize_script to expose a global object that needs to be used by your script.

    So, while previously you could (and still can) do this:

    wp_enqueue_script( 'wpdocs-my-script', 'https://url-to/my-script.js' );
    wp_localize_script( 'wpdocs-my-script', 'MYSCRIPT', array(
        'ajaxUrl' => admin_url( 'admin-ajax.php' ),
        'otherParam' => 'some value',
    ) );

    It seems that it’s now recommended to do it like this (which I personally believe is a lot uglier):

    wp_enqueue_script( 'wpdocs-my-script', 'https://url-to/my-script.js' );
    wp_add_inline_script( 'wpdocs-my-script', 'const MYSCRIPT = ' . json_encode( array(
        'ajaxUrl' => admin_url( 'admin-ajax.php' ),
        'otherParam' => 'some value',
    ) ), 'before' );

    Note that you need to add 'before' as the third parameter to the wp_add_inline_script function.

    Now, in your JS script you can access these PHP parameters like this:

    console.log( MYSCRIPT.ajaxUrl ); // output: "https://your-site/wp-admin/admin-ajax.php&quot;
    console.log( MYSCRIPT.otherParam ); // output: "some value"
  2. Skip to note 2 content
    Contributed by Clifford Paulick

    The following code can be used to easily add Typekit’s JavaScript to your theme:

    function mytheme_enqueue_typekit() {
       wp_enqueue_script( 'mytheme-typekit', 'https://use.typekit.net/.js', array(), '1.0' );
       wp_add_inline_script( 'mytheme-typekit', 'try{Typekit.load({ async: true });}catch(e){}' );
    add_action( 'wp_enqueue_scripts', 'mytheme_enqueue_typekit' );

    Which results in:

    <script type="text/javascript" src="https://use.typekit.net/.js?ver=1.0"></script&gt;
    <script type="text/javascript"> try{Typekit.load({ async: true });}catch(e){} </script>

    From https://make.wordpress.org/core/2016/03/08/enhanced-script-loader-in-wordpress-4-5/

  3. Skip to note 3 content
    Contributed by Pepro Dev. Group

    Add CSS Style without dependency

    wp_register_style( 'myprefix-dummy-css', false );
    wp_enqueue_style( 'myprefix-dummy-css' );
    wp_add_inline_style( 'myprefix-dummy-css', "body *{ box-sizing: inherit; }");

    Add JavaScript Code without dependency

    wp_register_script( 'myprefix-dummy-js-header', '',);
    wp_enqueue_script( 'myprefix-dummy-js-header' );
    wp_add_inline_script( 'myprefix-dummy-js-header', "console.log('loaded in header');");

    Add JavaScript Code with jQuery dependency

    wp_register_script( 'myprefix-dummy-js-footer', '', array("jquery"), '', true );
    wp_enqueue_script( 'myprefix-dummy-js-footer'  );
    wp_add_inline_script( 'myprefix-dummy-js-footer', "console.log('loaded in footer');");
  4. Skip to note 4 content
    Contributed by Aurovrata Venet

    NOTE: with new block themes such as Twenty Twenty Two, wp_localize_script/wp_add_inline_script will no longer work if called too late such as in a shortcode rendering callback function. To achieve this you will need to make use of an anonymous function call hooked on wp_footer action,

    $data=array();// your data object you want to pass to your front-end script.
    $localise = json_encode($data);
    add_action('wp_footer', function() use ($localise){
      printf('<script type="text/javascript">var myData = %s</script>', $localise);
  5. Skip to note 5 content
    Contributed by Aurovrata Venet

    this is handy function when you want to make sure your anonymous function uses an object that is instantiated using a javascript library that can potentially clash with other versions loaded by other plugins or by WordPress core itself. For example, if you need to use a different version of jQuery, you can do the following,

    wp_register_script( 'jquery3.2.1', 'https://code.jquery.com/jquery-3.2.1.min.js' );
    wp_add_inline_script( 'jquery3.2.1', 'var jQuery3_2_1 = $.noConflict(true);' );
    wp_enqueue_script( 'plugin-javascript', plugins_url( 'js.js', __FILE__ ), array( 'jquery3.2.1' ) );

    this will instantiate a new jQuery object `jquery3_2_1` right after the jquery library v3.2.1 is loaded by the browser, ensuring it has the right version references, which you can then pass as an attribute the `js.js` script,

    ( function( $ ) { //$ now uses v3.2.1 of jquery.
      // Alert jQuery version.
      // Plugin/theme code should go here.
    }( jQuery3_2_1 ) );
  6. Skip to note 6 content
    Contributed by dhinju

    For adding inline script

    function theme_prefix_enqueue_script() {
       wp_enqueue_script( 'main-js', '/main.js', array(), '1.0' );
       wp_add_inline_script( 'main-js', 'alert("hello world");' );
    add_action( 'wp_enqueue_scripts', 'theme_prefix_enqueue_script' );

    For jQuery-dependent scripts use this:

    function theme_prefix_enqueue_script() {
       if ( ! wp_script_is( 'jquery', 'done' ) ) {
         wp_enqueue_script( 'jquery' );
       wp_add_inline_script( 'jquery-migrate', 'jQuery(document).ready(function(){});' );
    add_action( 'wp_enqueue_scripts', 'theme_prefix_enqueue_script' );

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