Decoding async issue

disable_decoding_async.php

<?php
add_filter('wp_img_tag_add_decoding_attr', '__return_false');

wp_content_img_tag.php

<?php
/**
 * @snippet       Remove decoding=async when fetchpriority=high, loading=eager in rendered HTML globally
 * @article       https://kybernaut.cz/en/clanky/the-unintended-consequences-of-decodingasync-on-your-wordpress-sites-lcp/
 * @author        Karolína Vyskočilová
 * @compatible    Wordpress 6.1 and greater
 * @donate $9     https://www.paypal.com/paypalme/KarolinaVyskocilova
 */
 
add_filter( 'wp_content_img_tag', function( $filtered_image, $context, $attachment_id ) {

    if ( false !== strpos( $filtered_image, 'loading="eager"' ) || false !== stripos( $filtered_image, 'fetchpriority="high"' ) ) {
        $filtered_image = str_replace( ' decoding="async"', '', $filtered_image );
    }
    
    return $filtered_image;
}, 10, 3 );

wp_get_attachment_attributes.php

<?php
/**
 * @snippet       Remove decoding=async when fetchpriority=high, loading=eager or your custom class from WP handled images
 * @article       https://kybernaut.cz/en/clanky/the-unintended-consequences-of-decodingasync-on-your-wordpress-sites-lcp/
 * @author        Karolína Vyskočilová
 * @compatible    Wordpress 6.1 and greater
 * @donate $9     https://www.paypal.com/paypalme/KarolinaVyskocilova
 */
 
add_filter( 'wp_get_attachment_image_attributes', function( $attributes ) {
   if ( isset( $attributes['fetchpriority'] ) && 'high' === $attributes['fetchpriority'] 
       || isset( $attributes['loading'] ) && 'eager' === $attributes['loading']
       || isset( $attributes['class'] ) && false !== strpos( $attributes['class'], 'your-custom-hero-image-class' )
   ) {
       unset( $attributes['decoding'] );
   }
    return $attributes;
} );