web/web_advanced_search/static/src/xml/web_advanced_search_x2x.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Copyright 2017 Jairo Llopis <jairo.llopis@tecnativa.com>
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
<templates>
    <t t-name="web_advanced_search_x2x.proposition">
        <t t-if="widget.x2x_widget_name()">
            <div class="x2x_container"/>
        </t>
        <t t-if="!widget.x2x_widget_name()">
            <input type="text"/>
        </t>
    </t>
</templates>