WordPress - enqueue javascript data based on WordPress conditions and other scripts. Load scripts tags before and after dependent script loads

php-wp-enqueue-conditional-scriptload-before-dependent.php

<?php
function load_scripts(){
  global $wp_scripts;
  
  wp_register_script( 'theme-scripts', get_bloginfo('template_url').'/js/scripts.js', array('jquery'), '1.0', true );
  
  //if we're on the woocommerce checkout page
  if( is_checkout() ){
    $wp_scripts->add_data('theme-scripts','data','<!--START SCRIPT STRING-->
      // script to load before name-of-enqueued-script loads
      jQuery(\'input#billing_first_name\').appear(function(){
        jQuery(this).focus();
      });
      <!--END SCRIPT STRING-->');
  }
}
add_action('wp_enqueue_scripts','load_scripts' );

php-wp-enqueue-script-after-dependent-script.php

<?php
function load_theme_scripts(){
  wp_register_script( 'name-of-enqueued-script', get_bloginfo('template_url').'/js/scripts.js', array('jquery'), '1.0', false );
}
add_action('wp_enqueue_scripts','load_theme_scripts' );

/ http://wordpress.stackexchange.com/questions/33008/how-to-add-a-javascript-snippet-to-the-footer-that-requires-jquery
function load_this_other_script(){
 if( wp_script_is( 'name-of-enqueued-script', 'done' ) ) {
  ?>
  <script type="text/javascript">
    // script to load after name-of-enqueued-script loads
  </script>
  <?php
  }
}
add_action( 'wp_head', 'load_this_other_script' );