Usage

Add the following HTML where you want the contact button to appear:

{% set params = {...} %}

<a class="btn btn-primary" data-module="modal-contact" data-module-template="{{ h.get_contact_form_template_url(params) }}" href="{{ h.url_for('contact.form', **params) }}" title="{{ _('Contact') }}">
    <i class="fas fa-envelope"></i>{{ link_text if link_text else _('CONTACT BUTTON TEXT') }}
</a>

{% asset 'ckanext-contact/main' %}

Where params is a dict with three entries: package_id, resource_id, record_id (all of which are optional).