block_default_classname filter-hook . WP 5.6.0

Filters the default block className for server rendered blocks.

Usage

add_filter( 'block_default_classname', 'filter_function_name_9383', 10, 2 );
function filter_function_name_9383( $class_name, $block_name ){
	// filter...

	return $class_name;
}

$class_name(string)

The current applied classname.

$block_name(string)

The block name.

Changelog

Where the hook is called

$classname = apply_filters( 'block_default_classname', $classname, $block_name );

Where in WP core the hook is used WordPress