WP - pass variable into wp_footer and other actions hooks and filters

pass-vars-into-hooks.php

<?php

// Pass a value to a hook in an annonymous function
add_shortcode('show_weather',function(){
  $a = shortcode_atts( array(
     'location' => 'Vancouver, BC',
  ), $atts, 'show_weather' );
  
  $city = $a['location'];
  
  // somthing for the placeholder
  $return = "<div id='weather'><span>{$city}</span></div>";
  
  // resources required, but in footer
  // that require shortcode attribute `location`
  add_action('wp_footer', function() use ($city) { // 🎉
     //echo "<script> ... location: {$city}; ... </script>";
  });
});