functions.php and style.css for child themes

functions.php

<?php

    function add_this_script_footer(){ ?>

    <script>
        // intercomSettings must already be defined at this point
        intercomSettings.attribute1 = "value1";
        intercomSettings.attribute2 = "value2";
        Intercom('update');
    </script>

    <?php } 

    add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' );
    function theme_enqueue_styles() {
        wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );

    }

    add_action('wp_footer', 'add_this_script_footer'); 

?>

style.css

/*
Theme Name: joel-child
Theme URI: http://example.com/twenty-fifteen-child/
Description: Child theme for adding JS
Author: Joel Thompson
Author URI: joel.com
Template: zoomify
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Tags: light, dark, two-columns, right-sidebar, responsive-layout, accessibility-ready
Text Domain: joel-child
*/