WordPress at a glance
filter is not described

customize_partial_render_(partial_id) filter-hook . WP 4.5.0

Filters partial rendering for a specific partial.

The dynamic portion of the hook name, $partial->ID refers to the partial ID.

Usage

add_filter( 'customize_partial_render_(partial_id)', 'filter_function_name_1873', 10, 3 );
function filter_function_name_1873( $rendered, $partial, $container_context ){
	// filter...

	return $rendered;
}
$rendered(string/array/false)
The partial value.
Default: false
$partial(WP_Customize_Partial)
WP_Customize_Setting instance.
$container_context(array)
Optional array of context data associated with the target container.

Where the hook is called

WP_Customize_Partial::render()
wp-includes/customize/class-wp-customize-partial.php 241
$rendered = apply_filters( "customize_partial_render_{$partial->id}", $rendered, $partial, $container_context );

Where the hook is used (in WP core)

Does not used.