php-sse-react/examples/10-eventsource.html at master · clue/php-sse-react · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>EventSource Chat</title>
    <script>
        var es = new EventSource('chat'), username = '';
        es.addEventListener('message', function(event) {
            var data = JSON.parse(event.data);

            var message = document.createElement('div');
            if (data.username) {
                var strong = document.createElement('strong');
                strong.appendChild(document.createTextNode(data.username));
                message.appendChild(strong);
            }
            message.appendChild(document.createTextNode(data.message));
            message.classList.add('chat-message');

            var $messages = document.querySelector('.chat-messages');
            if ($messages.childNodes.length !== 0) {
                $messages.insertBefore(message, $messages.firstChild);
            } else {
                $messages.appendChild(message);
            }
        });

        document.addEventListener('DOMContentLoaded', function() {
            var $chatForm = document.querySelector('.chat-form');
            $chatForm.addEventListener('submit', function($event) {
                $event.preventDefault();
                var $input = document.querySelector('.chat-form input');
                if ($input.value.length) {
                    fetch('/message?message=' + encodeURIComponent($input.value) + '&username=' + encodeURIComponent(username)).then(function() {
                        $input.value = '';
                    });
                }
            });

            var $chatForm = document.querySelector('.username-form');
            $chatForm.addEventListener('submit', function($event) {
                $event.preventDefault();
                var $input = document.querySelector('.username-form input');
                if ($input.value.length > 3) {
                    document.activeElement.blur();
                    username = $input.value;
                    document.querySelector('.chat-header').innerText = username;
                    document.body.classList.add('hide-username');
                    setTimeout(function() {
                        document.querySelector('.username-form-container').style.display = 'none';
                        document.querySelector('.chat-form input').focus();
                    }, 800);
                }
            });
        });
    </script>

    <link href="styles.css" media="all" rel="stylesheet"/>
</head>
<body>
<div class="chat">
    <div class="chat-header"></div>
    <div class="chat-messages"></div>
    <div class="chat-footer">
        <form class="chat-form">
            <input type="text" placeholder="Enter chat message">
            <button type="submit">Send</button>
        </form>
    </div>
</div>
<div class="username-form-container">
    <form class="username-form">
        <input type="text" placeholder="Enter username" autofocus>
        <button type="submit">Enter</button>
    </form>
</div>
</body>
</html>