xmpp.chapril.org-conversejs/src/templates/register_panel.html

<form id="converse-register">
    <legend class="form-errors"></legend>
    <label>{{label_domain}}</label>
    <input type="text" name="domain" placeholder="e.g. conversejs.org">
    <input class="submit" type="submit" value="{{label_register}}">
    <span class="conn-feedback"></span>
</form>