How to access custom order item meta data from a meta key in WooCommerce?

add_filter( 'woocommerce_product_get_stock_quantity' ,'custom_get_stock_quantity', 10, 2 );
add_filter( 'woocommerce_product_variation_get_stock_quantity' ,'custom_get_stock_quantity', 10, 2 );
function custom_get_stock_quantity( $value, $product ) {
    $value = 15; // <== Just for testing
    return $value;
}

<script>
jQuery( document ).ready(function($){
	$(document).on('click','.elementor-location-popup a', function(event){
		elementorProFrontend.modules.popup.closePopup( {}, event);
	})
});
</script>

function search_by_sku( $search, &$query_vars ) {
    global $wpdb;
    if(isset($query_vars->query['s']) && !empty($query_vars->query['s'])){
        $args = array(
            'posts_per_page'  => -1,
            'post_type'       => 'product',
            'meta_query' => array(
                array(
                    'key' => '_sku',
                    'value' => $query_vars->query['s'],
                    'compare' => 'LIKE'
                )
            )
        );
        $posts = get_posts($args);
        if(empty($posts)) return $search;
        $get_post_ids = array();
        foreach($posts as $post){
            $get_post_ids[] = $post->ID;
        }
        if(sizeof( $get_post_ids ) > 0 ) {
                $search = str_replace( 'AND (((', "AND ((({$wpdb->posts}.ID IN (" . implode( ',', $get_post_ids ) . ")) OR (", $search);
        }
    }
    return $search;
    
}
    add_filter( 'posts_search', 'search_by_sku', 999, 2 );

/***** Shorten Post/Page link  *****/
//============================
add_filter( 'get_shortlink', function ( $shortlink ) {
    return $shortlink;
});

//******--- Remove Font Awesome ---*****
//===============================
add_action( 'elementor/frontend/after_register_styles',function() {
	foreach( [ 'solid', 'regular', 'brands' ] as $style ) {
		wp_deregister_style( 'elementor-icons-fa-' . $style );
	}
}, 20 );

//*****---  Remove Eicons:  ---*****
//==========================
add_action( 'wp_enqueue_scripts', 'remove_default_stylesheet', 20 ); 
function remove_default_stylesheet() { 
	wp_deregister_style( 'elementor-icons' ); 
}

input { -webkit-user-select:text;}

if ( is_single() ) {
  $current_post_id = get_queried_object_id();
  $current_category_id = get_the_category( $current_post_id )[0]->cat_ID;

  $args = array(
    'category' => $current_category_id,
    'post__not_in' => array( $current_post_id ),
    'posts_per_page' => 3,
  );

  $related_posts = new WP_Query( $args );

  if ( $related_posts->have_posts() ) {
    echo '<h2>Related Posts:</h2>';
    while ( $related_posts->have_posts() ) {
      $related_posts->the_post();
      echo '<a href="' . get_the_permalink() . '">' . get_the_title() . '</a><br>';
    }
    wp_reset_postdata();
  }
}

var key = "name";
var person = {[key]:"John"}; // same as var person = {"name" : "John"}
console.log(person); // should print  Object { name="John"}

cat ~/.ssh/id_rsa.pub

const generate = (meta) => {
  return [
    { charset: "utf-8" },
    { lang: "en" },
    { name: "viewport", content: "width=device-width, initial-scale=1" },
    { name: "format-detection", content: "telephone=no" },
    { name: "title", content: meta.title },
    { name: "author", content: meta.author },
    {
      name: "keywords",
      content: meta.keywords || "",
    },
    { name: "robots", content: "index,follow" },
    { name: "language", content: "English" },
    { name: "description", content: meta.description },
    { name: "theme-color", content: meta.color },
    { name: "og:type", content: "website" },
    { name: "apple-mobile-web-app-title", content: meta.title },
    { name: "og_site_name", content: meta.site || meta.title },
    { name: "og:site_name", content: meta.site || meta.title },
    { name: "og:locale", content: "en_US" },
    { name: "og:url", content: meta.url },
    { name: "og:title", content: meta.title },
    { name: "og:description", content: meta.description },
    { name: "og:image", content: meta.image },
    { name: "twitter:card", content: "summary_large_image" },
    { name: "twitter:url", content: meta.url },
    { name: "twitter:title", content: meta.title },
    { name: "twitter:description", content: meta.description },
    { name: "twitter:image", content: meta.image },
  ].map((i) => {
    var out = { ...i };
    if (!out.hid) {
      out.hid = out.name;
    }
    return out;
  }).map(i => `<meta name=${JSON.stringify(i.name)} content=${JSON.stringify(i.content)}/>`).join('\n');
};

const users = [
  { name: "user1", age: 28 },
  { name: "user2", age: 21 },
  { name: "user3", age: 38 },
  { name: "user4", age: 18 }
];

users.sort((user1, user2) => user1.age - user2.age);

console.log(users);

	<?php
// 	if ( $sent_to_admin ) {
// 		$before = '<a class="link" href="' . esc_url( $order->get_edit_order_url() ) . '">';
// 		$after  = '</a>';
// 	} else {
// 		$before = '';
// 		$after  = '';
// 	}
	
	$before = '<a class="link" href="' . esc_url( $order->get_edit_order_url() ) . '">';
	$after  = '</a>';
	

add_filter( 'woocommerce_email_attachments', 'attach_downloadable_files_to_customer_completed_email', 10, 3 );
function attach_downloadable_files_to_customer_completed_email( $attachments, $email_id, $order ) {
    if( isset( $email_id ) && $email_id === 'customer_completed_order' ){
        // Loop through order items
        foreach( $order->get_items() as $item ) {
            $product = $item->get_product(); // The product Object

            if ( $product->is_downloadable() && ( $downloads = $product->get_downloads() ) ) {
                // Loop through product downloads
                foreach( $downloads as $download ) {
                    $attachments[] = $download->get_file();
                }
            }
        }
    }
    return $attachments;
}