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"/>
    <textarea
        type="text"
        class="chat-textarea
            {[ if (o.show_send_button) { ]} chat-textarea-send-button {[ } ]}
            {[ if (o.composing_spoiler) { ]} spoiler {[ } ]}"
        placeholder="{{{o.label_personal_message}}}">{{ o.message_value }}</textarea>
    {[ if (o.show_send_button) { ]}
        <button type="submit" class="pure-button send-button">{{{ o.label_send }}}</button>
    {[ } ]}
</form>
</div>