HTTP/1.1 101 Switching Protocols
        Upgrade: websocket
        Connection: Upgrade
        Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=
        Sec-WebSocket-Protocol: chat

 GET /chat HTTP/1.1
 Host: server.example.com
 Upgrade: websocket
 Connection: Upgrade
 Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
 Origin: http://example.com
 Sec-WebSocket-Protocol: chat, superchat
 Sec-WebSocket-Version: 13

 WebSocket WebSocket(
  in DOMString url,
  in optional DOMString protocols
);

WebSocket WebSocket(
  in DOMString url,
  in optional DOMString[] protocols
);

 Feature: Simple chat 
	In order to websocket's challenge
	As a presenter
	I will create a simple chat

 Scenario: At the beginning every user can select their name
	Given New user
	When try to connect to the chat
	Then user can select his name

 Scenario: New message
	Given user which was already connected to the chat
	And several users was already connected to the chat
	When user enter a new message
	Then all users will receive message

 Scenario: Message history
	Given New user 
	And History is not empty
	When Use connect to the chat
	Then User will recieve entire message history

 Scenario: Close connection
	Given User which was already connected to the chat
	When a user closes the browser window
	Then server will post another system message to the console that a user has disconnected.

• type
• message - one element
• author
• text
• time
• history
• array of elements

 input.keydown(function(e) {
    var msg;
    if (e.keyCode === 13) {
      msg = $(this).val();
      if (!msg) return;
      connection.send(msg);
      $(this).val("");}

• WebGL
  
• Files
• XHR2
• WebSockets
• DataView
• Type arrays
• Blobs
• Clamped array
• ...

var buffer = new ArrayBuffer(16)

var dv = new DataView(buffer, 8, 4)

 dv.setUint16(2, 0x1337)

dv.getInt8(2) -> 0x13

 Blob Blob(
  [optional] Array parts,
  [optional] BlobPropertyBag properties
);

 Blob slice(
  optional long long start,
  optional long long end,
  optional DOMString contentType
};

1. { msg:”challenge_accepted”, name: “Socketeers” }
   
2. { msg: “auth”, auth_token: “6f7sd8s78”}
3. Task1 request: { msg: “task_one”,  auth_token: “6f7sd8s78”}
4. Task1 server response: { msg: “compute”, operator:”+/-/*”, operands:[4,5]}
5. Task1 send result: { msg: “task_one_result”, result: “9”, auth_token: “6f7sd8s78” }
6. Task2 request: { msg: ???, auth_token: “6f7sd8s78” }
7. Task2 server response: {msg: “binary_sum”, bits: 8/16 } and ArrayBuffer (16 bytes)Convert to an unsigned typed array according to the `bits` field
8. Task2 send result: { msg: “task_two_result”, result: “0”, auth_token: “6f7sd8s78” }