Title: wp_set_client_side_media_processing_flag
Published: August 20, 2026

---

# wp_set_client_side_media_processing_flag()

## In this article

 * [Source](https://developer.wordpress.org/reference/functions/wp_set_client_side_media_processing_flag/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/functions/wp_set_client_side_media_processing_flag/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/functions/wp_set_client_side_media_processing_flag/?output_format=md#changelog)

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

Sets a global JS variable to indicate that client-side media processing is enabled.

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

    ```php
    function wp_set_client_side_media_processing_flag(): void {
    	if ( ! wp_is_client_side_media_processing_enabled() ) {
    		return;
    	}

    	wp_add_inline_script( 'wp-block-editor', 'window.__clientSideMediaProcessing = true;', 'before' );

    	$chromium_version = wp_get_chromium_major_version();

    	if ( null !== $chromium_version && $chromium_version >= 137 ) {
    		wp_add_inline_script( 'wp-block-editor', 'window.__documentIsolationPolicy = true;', 'before' );
    	}
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/media.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/media.php#L6600)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/media.php#L6600-L6612)

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

| Uses | Description | 
| [wp_get_chromium_major_version()](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/)`wp-includes/media.php` |

Returns the major Chrome/Chromium version from the current request’s User-Agent.

  | 
| [wp_is_client_side_media_processing_enabled()](https://developer.wordpress.org/reference/functions/wp_is_client_side_media_processing_enabled/)`wp-includes/media.php` |

Checks whether client-side media processing is enabled.

  | 
| [wp_add_inline_script()](https://developer.wordpress.org/reference/functions/wp_add_inline_script/)`wp-includes/functions.wp-scripts.php` |

Adds extra code to a registered script.

  |

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

| Version | Description | 
| [7.1.0](https://developer.wordpress.org/reference/since/7.1.0/) | Introduced. |

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