WordPress at a glance
filter is not described

rest_jsonp_enabled filter-hook . WP 4.4.0

Filters whether jsonp is enabled.

Usage

add_filter( 'rest_jsonp_enabled', 'filter_function_name_9126' );
function filter_function_name_9126( $jsonp_enabled ){
	// filter...

	return $jsonp_enabled;
}
$jsonp_enabled(true/false)
Whether jsonp is enabled.
Default: true

Where the hook is called

WP_REST_Server::serve_request()
wp-includes/rest-api/class-wp-rest-server.php 274
$jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true );

Where the hook is used (in WP core)

Does not used.