sabrina-zeidan

//Do not load plugins' scripts and styles on every page - only where they are in use
add_filter( 'style_loader_tag', 'sz_stop_loading_unused_styles', 10, 2 ); // *doesn't works with 3 arguments
function sz_stop_loading_unused_styles( $tag, $handle) {
	 if (!is_user_logged_in()){// for FE only
		if (is_singular('post')) {// for Posts only			
			//entire plugin
			if (str_contains($tag, 'woocommerce')) $tag = '';			
			//specific handle
			//Gutenberg
			if (in_array( $handle, ['wc-blocks-style', 'wp-block-editor', 'wp-editor', 'wp-block-library', 'wp-components'])) $tag = '';

sabrina-zeidan

// Get ACF value whetherit comes from regular ACF or ACF block
// Useful if you need to access ACF fileds that are in block as regular fields
// Usage: get_acf_block_data($post, 'acf/talk-description', 'talk_description' )
function get_acf_block_data($post, $block_name = 'acf/default-block-name', $field_name = "" ){
	$content = "";
	if ( has_blocks( $post->post_content ) && !empty($field_name )) {
	    $blocks = parse_blocks( $post->post_content );
	    foreach($blocks as $block){			
		    if ( $block['blockName'] === $block_name ) {
		    	if(isset($block["attrs"]["data"][$field_name ])){

sabrina-zeidan

//Add missing width and height to the specific img to avoid layout shift, knowing its parent element class
//Or modify anything at all via WP Rocket buffer
add_filter('rocket_buffer','sz_wprocket_modify_buffer', 10);
function sz_wprocket_modify_buffer ($buffer){
$dom = new DOMDocument();
$dom->loadHTML($buffer);
$xpath = new DOMXPath($dom);
	$expression = './/div[contains(concat(" ", normalize-space(@class), " "), " mypic ")]'; //tag and class here
	foreach ($xpath->evaluate($expression) as $parentelement) 	{
		foreach ($parentelement->getElementsByTagName('img') as $tag) { //targeting img inside the parent tag

sabrina-zeidan

//Known issue in Safari 15.4, happens in WPR as well as in other LL plugins
//https://github.com/wp-media/wp-rocket/issues/4961
//Removes loading="lazy" by filtering output buffer in case it wasn't removed in the regular way
add_filter('rocket_buffer', 'sz_wprocket_filter_buffer_native_ll', 10);
function sz_wprocket_filter_buffer_native_ll ($buffer){      
		$buffer = str_replace('loading="lazy"', '', $buffer);
        return $buffer;
}

sabrina-zeidan

//Prevent Add2Any CSS from being loaded
add_action( 'wp_print_styles','sz_a2a_optimize_styles', 10 );
function sz_a2a_optimize_styles() {
	if ( is_front_page() || is_archive() ) {
		wp_dequeue_style('addtoany-inline'); 
		wp_dequeue_style('addtoany'); 
	}
}

//Prevent Add2Any JS from being loaded

sabrina-zeidan

//Important: When adding a gist link in Editor you MUST choose - convert to link, not Embed!			
//Embed Gists to be displayed in Gutenberg without plugin, works on new and existing ones



add_filter( 'render_block', 'sz_embed_gists_in_gutenberg_block', 10, 2 );
function sz_embed_gists_in_gutenberg_block( $block_content, $block ) {
	// Check if the block is a paragraph block
	if ( $block['blockName'] !== 'core/paragraph' ) {
		return $block_content;

sabrina-zeidan

//Disable native WP lazyloading for images by adding a CSS class lazyload-disabled  in Block Editor
//Now let's make the magic happen
add_filter('wp_img_tag_add_loading_attr', 'sz_disable_ll', 10, 3);
function sz_disable_ll($value, $image, $context){
    $disabled_class = 'lazyload-disabled';
    if (false !== strpos($image, $disabled_class)) {
        return false;
    }
    return $value;

sabrina-zeidan

//In a better world block's author makes sure the block's assests are loaded only if block is actually in use (via enqueue_block_assets). For other cases:

add_filter( 'script_loader_tag', 'sz_stop_loading_unused_block_crap', 10, 3 );
function sz_stop_loading_unused_block_crap( $tag, $handle, $src ) {
	// Check if block's assets are loaded 
	if (str_contains($src, 'plugins/wp-swiper')) {	//plugin directory here 					
		 if (is_singular()) {// works only on Singular
			 //TODO: //Will work for content only. if block is elsewhere or post it's archive use this https://wordpress.stackexchange.com/questions/392493/find-if-widget-block-is-active
     	 $id = get_the_ID();	
			if (has_block('da/wp-swiper-slide', $id) !== true) { //block name here

sabrina-zeidan

//rocket_buffer in theory should work no matter if gallery/slider is in the_content or not, inserted via js etc
//they don't have class and it's not possibleto assignit specifically to img elements -- here is what we can do
//we need to know: smallest parent element that contains them all
//checked -- it doesn't impact those exclusions added via ui

add_filter('rocket_buffer', 'sz_exclude_images_without_class_from_ll');
function sz_exclude_images_without_class_from_ll($buffer) {
    $document = new DOMDocument();
    libxml_use_internal_errors(true);

sabrina-zeidan

//For testing purposes
if (!is_user_logged_in() ) {
    function sz_wprocket_filter_buffer($buffer)
    {
        $jetpack_cdn = 'https://i1.wp.com/';
        $buffer = preg_replace('/((http|https)\:\/\/)(([^\"|^\)|^\']*?)(?:.jpg|.jpeg|.png))/im', $jetpack_cdn . '${3}', $buffer);
        return $buffer;
    }

    add_filter('rocket_buffer', 'sz_wprocket_filter_buffer', 10);