demo/templates/page_index.html.j2


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{% extends "base.html.j2" %}

{% block content %}
<div id="container">
    <h2>Messages</h2>
    {% include "frag_messages.html.j2" %}

    <form id="send_form" action="/" method="post" htmp replace="messages">
        <input required minlength="1" maxlength="20" type="text" name="username" placeholder="Username...">
        <input required minlength="1" maxlength="140" type="text" name="message" placeholder="Message...">
        <button type="submit">Send</button>
    </form>

    <script>
    document.getElementById("send_form").addEventListener("submit", function(event) {
        // add message immediately to #messages
        const username = this.querySelector('input[name="username"]').value;
        const message = this.querySelector('input[name="message"]').value;
        const ts = new Date(Date.now()).toISOString().slice(0, 10);
        const messages = document.getElementById("messages");
        const newMessage = document.createElement("div");
        newMessage.innerHTML = `<small>${ts}</small> <strong>${username}</strong>: ${message}`;
        messages.prepend(newMessage);
    });
    </script>
</div>
{% endblock %}