cooperative-market/pos_keyboard/data.xml

<?xml version="1.0" encoding="utf-8" ?>
<!--Copyright 2015 igallyamov <https://github.com/igallyamov>
    Copyright 2016 ufaks <https://github.com/ufaks>
    Copyright 2019 Kolushov Alexandr <https://it-projects.info/team/kolushovalexandr>
    License MIT (https://opensource.org/licenses/MIT). -->
<openerp>

        <template id="assets" inherit_id="point_of_sale.assets">
            <xpath expr="." position="inside">
                <script
                type="text/javascript"
                src="/pos_keyboard/static/src/js/pos.js"
            />
            </xpath>
        </template>

        <template id="demo_assets_backend" inherit_id="web.assets_backend">
            <xpath expr="." position="inside">
                <script
                type="text/javascript"
                src="/pos_keyboard/static/src/js/test_pos_keyboard.js"
            />
            </xpath>
        </template>

</openerp>