dolibarr/htdocs/modulebuilder/template/js/mymodule.js.php

<?php
/* <one line to give the program's name and a brief idea of what it does.>
 * Copyright (C) <year>  <name of author>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * \file    htdocs/modulebuilder/template/js/mymodule.js.php
 * \ingroup mymodule
 * \brief   Example JavaScript.
 *
 * Put detailed description here.
 */

header('Content-Type: application/javascript');