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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <ul class="chat-thread">
	<li>Are we meeting today?</li>
	<li>yes, what time suits you?</li>
	<li>I was thinking after lunch, I have a meeting in the morning</li>
</ul>

<form class="chat-window">
	<input class="chat-window-message" name="chat-window-message" type="text" autocomplete="off" autofocus />
</form>
            
          
!

CSS

            
              // Imports
// --------------------------------------
@import 'https://fonts.googleapis.com/css?family=Noto+Sans';

// Variables
// --------------------------------------
$scrollbar-width:              10px;
$chat-thread-bgd-color:        rgba(25,147,147,0.2);
$chat-thread-msg-arrow-size:   15px;
$chat-thread-avatar-size:      50px;
$chat-thread-offset:           #{$chat-thread-avatar-size + 30px};

body {
	padding: 0;
	margin: 0;
	background: -moz-linear-gradient(-45deg, #183850 0, #183850 25%, #192C46 50%, #22254C 75%, #22254C 100%);
	background: -webkit-linear-gradient(-45deg, #183850 0, #183850 25%, #192C46 50%, #22254C 75%, #22254C 100%);
	background-repeat: no-repeat;
  background-attachment: fixed;
}

::-webkit-scrollbar {
    width: $scrollbar-width;
}
 
::-webkit-scrollbar-track {
    border-radius: $scrollbar-width;
    background-color: rgba(25,147,147,0.1);
}
 
::-webkit-scrollbar-thumb {
     border-radius: $scrollbar-width;
    background-color: $chat-thread-bgd-color;
}

.chat-thread {
	margin: 24px auto 0 auto;
	padding: 0 20px 0 0;
	list-style: none;
	overflow-y: scroll;
  overflow-x: hidden;
}

.chat-thread li {
	position: relative;
	clear: both;
	display: inline-block;
	padding: 16px 40px 16px 20px;
	margin: 0 0 20px 0;
	font: 16px/20px 'Noto Sans', sans-serif;
	border-radius: 10px;
	background-color: $chat-thread-bgd-color;
}

/* Chat - Avatar */
.chat-thread li:before {
	position: absolute;
	top: 0;
	width: $chat-thread-avatar-size;
	height: $chat-thread-avatar-size;
	border-radius: $chat-thread-avatar-size;
	content: '';
}

/* Chat - Speech Bubble Arrow */
.chat-thread li:after {
	position: absolute;
  top: $chat-thread-msg-arrow-size;
	content: '';
	width: 0;
	height: 0;
	border-top: $chat-thread-msg-arrow-size solid $chat-thread-bgd-color;
}

.chat-thread li:nth-child(odd) {
	animation: show-chat-odd 0.15s 1 ease-in;
	-moz-animation: show-chat-odd 0.15s 1 ease-in;
	-webkit-animation: show-chat-odd 0.15s 1 ease-in;
	float: right;
	margin-right: $chat-thread-offset;
	color: #0AD5C1;
}

.chat-thread li:nth-child(odd):before {
	right: -$chat-thread-offset;
  // Placeholder avatar 1
	background-image: url(data:image/jpeg;base64,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);
}

.chat-thread li:nth-child(odd):after {
	border-right: $chat-thread-msg-arrow-size solid transparent;
	right: -$chat-thread-msg-arrow-size;
}

.chat-thread li:nth-child(even) {
	animation: show-chat-even 0.15s 1 ease-in;
	-moz-animation: show-chat-even 0.15s 1 ease-in;
	-webkit-animation: show-chat-even 0.15s 1 ease-in;
	float: left;
	margin-left: $chat-thread-offset;
	color: #0EC879;
}

.chat-thread li:nth-child(even):before {
	left: -$chat-thread-offset;
  // Placeholder avatar 2
	background-image: url(data:image/jpeg;base64,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);
}

.chat-thread li:nth-child(even):after {
	border-left: $chat-thread-msg-arrow-size solid transparent;
	left: -$chat-thread-msg-arrow-size;
}

.chat-window {
	position: fixed;
	bottom: 18px;
}

.chat-window-message {
	width: 100%;
	height: 48px;
	font: 32px/48px 'Noto Sans', sans-serif;
	background: none;
	color: #0AD5C1;
	border: 0;
	border-bottom: 1px solid $chat-thread-bgd-color;
	outline: none;
}

// A tiny bit responsive...
// --------------------------------------
/* Small screens */
@media all and (max-width: 767px) {
	.chat-thread {
		width: 90%;
		height: 260px;
	}

	.chat-window {
		left: 5%;
		width: 90%;
	}
}

/* Medium and large screens */
@media all and (min-width: 768px) {
	.chat-thread {
		width: 50%;
		height: 320px;
	}

	.chat-window {
		left: 25%;
		width: 50%;
	}
}

// Animation
// --------------------------------------
@keyframes show-chat-even {
  0% {
    margin-left: -480px;
  }
  100% {
    margin-left: 0;
  }
}

@-moz-keyframes show-chat-even {
  0% {
    margin-left: -480px;
  }
  100% {
    margin-left: 0;
  }
}

@-webkit-keyframes show-chat-even {
  0% {
    margin-left: -480px;
  }
  100% {
    margin-left: 0;
  }
}

@keyframes show-chat-odd {
  0% {
    margin-right: -480px;
  }
  100% {
    margin-right: 0;
  }
}

@-moz-keyframes show-chat-odd {
  0% {
    margin-right: -480px;
  }
  100% {
    margin-right: 0;
  }
}

@-webkit-keyframes show-chat-odd {
  0% {
    margin-right: -480px;
  }
  100% {
    margin-right: 0;
  }
}
            
          
!

JS

            
              // Chat (WebRTC)
//
// Currently supported in Chrome and Firefox only.
// WebRTC support is ultra basic at the moment - send/receive // in current window only.
// Design based on Bookmarks app by // Eyal Zuri - http://dribbble.com/shots/1261465-Bookmarks-app-gif
//
// The below JS has been adapted from this excellent RTCDataChannel demo
// http://simpl.info/rtcdatachannel/

var sendChannel, 
	receiveChannel,
	chatWindow = document.querySelector('.chat-window'),
	chatWindowMessage = document.querySelector('.chat-window-message'),
	chatThread = document.querySelector('.chat-thread');

// Create WebRTC connection
createConnection();

// On form submit, send message
chatWindow.onsubmit = function (e) {
	e.preventDefault();

	sendData();

	return false;
};

function createConnection () {
    var servers = null;

    if (window.mozRTCPeerConnection) {
	    window.localPeerConnection = new mozRTCPeerConnection(servers, {
	        optional: [{
	            RtpDataChannels: true
	        }]
	    });
    } else {
	    window.localPeerConnection = new webkitRTCPeerConnection(servers, {
	        optional: [{
	            RtpDataChannels: true
	        }]
	    });
    }

    try {
        // Reliable Data Channels not yet supported in Chrome
        sendChannel = localPeerConnection.createDataChannel('sendDataChannel', {
            reliable: false
        });
    } catch (e) {
    }

    localPeerConnection.onicecandidate = gotLocalCandidate;
    sendChannel.onopen = handleSendChannelStateChange;
    sendChannel.onclose = handleSendChannelStateChange;

    if (window.mozRTCPeerConnection) {
	    window.remotePeerConnection = new mozRTCPeerConnection(servers, {
	        optional: [{
	            RtpDataChannels: true
	        }]
	    });
    } else {
	    window.remotePeerConnection = new webkitRTCPeerConnection(servers, {
	        optional: [{
	            RtpDataChannels: true
	        }]
	    });
    }

    remotePeerConnection.onicecandidate = gotRemoteIceCandidate;
    remotePeerConnection.ondatachannel = gotReceiveChannel;

    // Firefox seems to require an error callback
    localPeerConnection.createOffer(gotLocalDescription, function (err) {
    });
}

function sendData () {
    sendChannel.send(chatWindowMessage.value);
}

function gotLocalDescription (desc) {
    localPeerConnection.setLocalDescription(desc);
    remotePeerConnection.setRemoteDescription(desc);
    // Firefox seems to require an error callback
    remotePeerConnection.createAnswer(gotRemoteDescription, function (err) {
    });
}

function gotRemoteDescription (desc) {
    remotePeerConnection.setLocalDescription(desc);
    localPeerConnection.setRemoteDescription(desc);
}

function gotLocalCandidate (event) {
    if (event.candidate) {
        remotePeerConnection.addIceCandidate(event.candidate);
    }
}

function gotRemoteIceCandidate (event) {
    if (event.candidate) {
        localPeerConnection.addIceCandidate(event.candidate);
    }
}

function gotReceiveChannel (event) {
    receiveChannel = event.channel;
    receiveChannel.onmessage = handleMessage;
    receiveChannel.onopen = handleReceiveChannelStateChange;
    receiveChannel.onclose = handleReceiveChannelStateChange;
}

function handleMessage (event) {
    var chatNewThread = document.createElement('li'),
    	chatNewMessage = document.createTextNode(event.data);

    // Add message to chat thread and scroll to bottom
    chatNewThread.appendChild(chatNewMessage);
    chatThread.appendChild(chatNewThread);
    chatThread.scrollTop = chatThread.scrollHeight;

    // Clear text value
    chatWindowMessage.value = '';
}

function handleSendChannelStateChange () {
    var readyState = sendChannel.readyState;

    if (readyState == 'open') {
        chatWindowMessage.disabled = false;
        chatWindowMessage.focus();
    	chatWindowMessage.placeholder = "";
    } else {
        chatWindowMessage.disabled = true;
    }
}

function handleReceiveChannelStateChange () {
    var readyState = receiveChannel.readyState;
} 
            
          
!
999px

Console