Title: WP_Scripts::is_delayed_strategy
Published: August 8, 2023
Last modified: February 24, 2026

---

# WP_Scripts::is_delayed_strategy( string|mixed $strategy ): bool

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#wp--skip-link--target)

This function’s access is marked private. This means it is not intended for use 
by plugin or theme developers, only by core. It is listed here for completeness.

Checks if the strategy passed is a valid delayed (non-blocking) strategy.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#parameters)󠁿

 `$strategy`string|mixedrequired

The strategy to check.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#return)󠁿

 bool True if $strategy is one of the delayed strategies, otherwise false.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#source)󠁿

    ```php
    private function is_delayed_strategy( $strategy ): bool {
    	return in_array(
    		$strategy,
    		$this->delayed_strategies,
    		true
    	);
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes_class-wp-scripts-php-2/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-scripts.php#L951)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-scripts.php#L951-L957)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#related)󠁿

| Used by | Description | 
| [WP_Scripts::add_data()](https://developer.wordpress.org/reference/classes/wp_scripts/add_data/)`wp-includes/class-wp-scripts.php` |

This overrides the add_data method from [WP_Dependencies](https://developer.wordpress.org/reference/classes/wp_dependencies/), to support normalizing of $args.

  | 
| [WP_Scripts::do_item()](https://developer.wordpress.org/reference/classes/wp_scripts/do_item/)`wp-includes/class-wp-scripts.php` |

Processes a script dependency.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_scripts/is_delayed_strategy/?output_format=md#changelog)󠁿

| Version | Description | 
| [6.3.0](https://developer.wordpress.org/reference/since/6.3.0/) | Introduced. |

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