WordPress localize dev environment variable

$script_source = get_stylesheet_directory_uri() . '/js/my-script.js';
// enqueue
wp_enqueue_script( 'my-script-for-wp', $script_source, array( 'jquery' ) );
// 'localize' our data. Just means add it to the dom as a JS variable
wp_localize_script( 'my-script-for-wp', 'devEnvironment', get_dev_enviroment() );