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block_core_navigation_set_overlay_image_fetch_priority › WordPress Function

Since7.0.0
Deprecatedn/a
› block_core_navigation_set_overlay_image_fetch_priority ( $overlay_blocks_html )
Parameters:
  • (string) $overlay_blocks_html The rendered HTML of the overlay blocks.
    Required: Yes
Returns:
  • (string) Modified HTML with fetchpriority="low" on all IMG tags.
Defined at:
Codex:

Sets fetchpriority="low" on all IMG tags within the navigation overlay.

Images in the overlay are hidden until the menu is opened, so they should not compete with any actual LCP element image on the page.


Related Functions: block_core_details_set_img_fetchpriority_low, block_core_navigation_overlay_html_has_close_block, render_block_core_navigation_overlay_close, block_core_navigation_add_directives_to_overlay_close, block_core_navigation_get_classic_menu_fallback

Source 

function block_core_navigation_set_overlay_image_fetch_priority( string $overlay_blocks_html ): string {
	$tags = new WP_HTML_Tag_Processor( $overlay_blocks_html );
	while ( $tags->next_tag( 'IMG' ) ) {
		$tags->set_attribute( 'fetchpriority', 'low' );
	}
	return $tags->get_updated_html();
}