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How to use customize_render_partials_response filter in WordPress

Sandeep Kumar Mishra
Sandeep Kumar Mishra
July 12, 2022
5 minutes read

customize_render_partials_response filter

Plugins may use this filter to inject $scripts and $styles, which are dependencies for the partials being rendered. The response data will be available to the client via the render-partials-response JS event, so the client can then inject the scripts and styles into the DOM if they have not already been enqueued there.

To use customize_render_partials_response filter, first you have to register it using add_filter. You can write this code into functions.php of your activated theme or in a custom WordPress Plugin.

We at Flipper Code, always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function modify_customize_render_partials_response_defaults which takes 3 parameters and we registered using add_filter. The first parameter customize_render_partials_response is name of the hook, The second parameter modify_customize_render_partials_response_defaults is name of the function which need to be called, third parameter is the priority of calling the hook if same hook is used multiple times and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometime, you have to remove a registered hook so you can use remove_filter to remove customize_render_partials_response filter.


    Below are the 3 parameters are required to use this hook.

  • $response : (array) Response.
    (array) Associative array mapping a partial ID its corresponding array of contents for the containers requested.
    (array) List of errors triggered during rendering of partials, if WP_DEBUG_DISPLAY is enabled.
  • $refresh : (WP_Customize_Selective_Refresh) Selective refresh component.
  • $partials : (array) Placements’ context data for the partials rendered in the request. The array is keyed by partial ID, with each item being an array of the placements’ context data.

Live Example

apply_filters( 'customize_render_partials_response', array $response, WP_Customize_Selective_Refresh $refresh, array $partials )

Below is an example how you can use this hook.

                        function modify_customize_render_partials_response_defaults($response, $refresh, $partials) { 
                            // Update the $response variable according to your website requirements and return this variable. You can modify the $response variable conditionally too if you want.

                            return $response; 
                        // add the filter
                        add_filter( "customize_render_partials_response", "modify_customize_render_partials_response_defaults", 10, 3 );

To remove a hook callback, use the example below.

remove_filter( "customize_render_partials_response", "modify_customize_render_partials_response_defaults", 10, 3 );

Please make sure provide the same callback function name, priority and number of arguments while removing the hook callback.

Flipper Code is a Premium WordPress Plugins development company and integrating new functionalites into WordPress sites in form of custom WordPress Plugins since 2012. If you’re having any trouble using this hook, please contact our WordPress Development Team and we’d be happy to assist you.

Sandeep Kumar Mishra

Sandeep Kumar Mishra writes about WordPress and Artificial Intelligence, offering tips and guides to help you master your website and stay updated with the latest tech trends.

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