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

<div class="message-form-container">
<div class="new-msgs-indicator hidden">▼ {{{ o.unread_msgs }}} ▼</div>
<form class="sendXMPPMessage">
    {[ if (o.show_toolbar) { ]}
        <ul class="chat-toolbar no-text-select"></ul>
    {[ } ]}
    <input type="text" placeholder="{{o.label_spoiler_hint}}" value="{{ o.hint_value }}"
           class="{[ if (!o.composing_spoiler) { ]} hidden {[ } ]} spoiler-hint"/>

    <div class="suggestion-box">
        <ul class="suggestion-box__results suggestion-box__results--above" hidden></ul>
        <textarea
            type="text"
            class="chat-textarea suggestion-box__input
                {[ if (o.show_send_button) { ]} chat-textarea-send-button {[ } ]}
                {[ if (o.composing_spoiler) { ]} spoiler {[ } ]}"
            placeholder="{{{o.label_message}}}">{{ o.message_value }}</textarea>
        <span class="suggestion-box__additions visually-hidden" role="status" aria-live="assertive" aria-relevant="additions"></span>

        {[ if (o.show_send_button) { ]}
            <button type="submit" class="pure-button send-button">{{{ o.label_send }}}</button>
        {[ } ]}
    </div>
</form>
</div>