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

{[ if (label) { ]}
<label>
    {{{label}}}
</label>
{[ } ]}
<div class="input-group">
    <input name="{{{name}}}" type="{{{type}}}"
        {[ if (value) { ]} value="{{{value}}}" {[ } ]}
        {[ if (required) { ]} class="required" {[ } ]} />
    <span title="{{{domain}}}">{{{domain}}}</span>
</div>