block_core_navigation_filter_out_empty_blocks() │ WP 5.9.0

Filter out empty "null" blocks from the block list. 'parse_blocks' includes a null block with '\n\n' as the content when it encounters whitespace. This is not a bug but rather how the parser is designed.

No Hooks.

Returns

Array. the normalized parsed blocks.

Usage

block_core_navigation_filter_out_empty_blocks( $parsed_blocks );
$parsed_blocks(array) (required)
the parsed blocks to be normalized.

Changelog

Since 5.9.0 Introduced.

block_core_navigation_filter_out_empty_blocks() code WP 6.9.1

wp-includes/blocks/navigation.php 
function block_core_navigation_filter_out_empty_blocks( $parsed_blocks ) {
	$filtered = array_filter(
		$parsed_blocks,
		static function ( $block ) {
			return isset( $block['blockName'] );
		}
	);

	// Reset keys.
	return array_values( $filtered );
}