Simple example of how to use SCRIPT_DEBUG to load non-minified assets

gistfile1.php

<?php
// Use minified libraries if SCRIPT_DEBUG is turned off
$suffix = ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '' : '.min';

wp_enqueue_script( 'my-script-handle', plugin_dir_url( __FILE__ ) . 'assets/my-file' . $suffix . '.js', array( 'jquery' ) );