disable-submit.php

<?php
/*
 * Plugin Name:       Gravity Forms - Disable Submit
 * Plugin URI:        https://github.com/leepeterson/gravity-forms-disable-submit/
 * Description:       Disable the submit button on a form once pressed to avoid duplicate submissions.
 * Version:           2.0
 * Author:            Lee Peterson
 * Author URI:        http://www.rawlemurdy.com
 * License:           GNU General Public License v2
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       gf-disble-submit
 * Domain Path:       /languages
 * GitHub Plugin URI: https://github.com/leepeterson/gravity-forms-disable-submit/
 * GitHub Branch:     master
 * GitHub Languages:  https://github.com/afragen/github-updater-translations
*/
add_action("wp_enqueue_scripts", function(){
	wp_register_script(
		"ac-gf-disable-submit"
		,	plugins_url('disable-submit.js', __FILE__)
		, "jquery"
		, "0.2"
		, true
	);

	// Localize the script with new data
	;
	wp_localize_script('ac-gf-disable-submit', 'disable_submit', array(
		'processing_text' => apply_filters('ac_gf_disable_submit_processing_text', __( 'Submitting…' )),
	));

	wp_enqueue_script("ac-gf-disable-submit");
});