End-to-end W3C APIs

End-to-end W3C APIs By Alexandre MorgautJS.everywhere(2012) Silicon Valley

Presentation• W3C AC member• Web Architect• JS Expert• REST Lover• NoSQL Fanboy• W3C “jseverywhere“ community group @amorgaut

Agenda• The World Wide Web• The Standards• Server-Side JavaScript• Web Applications• Now & Tomorrow

The Web• WWW: WorldWideWeb (aka “Hypertext Project”) • UDI: Uniform Document Identifier • HTML: Hypertext Markup Language • HTTP: Hypertext Transfer Protocol• created in 1989 by Tim Berners-Lee

REST• Representational State Transfer • Client-Server • Stateless, Cache, Uniform Interface • Layered System • Code on Demand: JavaScript• defined in 2000 by Roy Thomas Fielding

Web Standards

W3C• Created at the MIT in 1994• Led by Tim Berners-Lee and Dr. Jeffrey Jaffe• Joint agreement among three "Host Institutions" • MIT, ERCIM, Keio University• Working Groups • HTML, MathML, RDF, SVG, CSS, Audio, Device...

IANA• Internet Assigned Numbers Authority• created by Jon Postel and Joyce K. Reynolds• department of ICANN Names and Numbers) (Internet Corporation for Assigned• manages • Domain Names, IP Addresses, Protocol registries• MIME Media Types • application, text, image, multipart...

IETF• Internet Engineering Task Force• organized activity of the Internet Society (ISOC)• cooperates with W3C & ISO/IEC• manages the RFCs (Request For Comments) • DNS, FTP, HTTP, SMTP, Zlib, Cookie, Atom

ECMA• European Computer Manufacturers Association• Standards • CD-ROM, ECMAScript, C#, Office Open XML File Formats• JavaScript • ECMA-262 aka ECMAScript aka ISO/IEC 16262 • TC39-TG1 managed by Mr. J. Neumann • E4X: ECMAScript for XML • ECMAScript Internationalization API • Test262 http://wiki.ecmascript.org

WaSP• Web Standards Project• founded in 1998 by Georges Olsen, Glenn Davis, & Jeffrey Zeldman• convinced in 2001 Microsoft, Netscape, Opera & other browsers to support HTML 4.01, XHTML 1.0, CSS1, and ECMAScript• AcidTests (by Ian Hickson) • 1: HTML 4 & CSS 1 • 2: CSS 1 & CSS 2 • 3: HTML 4, XHTML 1.0, CSS 2.1, DOM 2, ECMAScript 3.1 • Today last versions of all major Browsers 100% compliant

WHATWG• Web Hypertext Application Technology Working Group• founded in 2004 by individuals from Apple, the Mozilla & Opera• Led by Ian Hickson• Created to work on HTML5 based on Web Apps 1.0 + Web Forms 2.0 while the W3C choose to concentrate on XHTML• HTML being a living standard (no more versions)• Proposed • Web Workers, Web Storage, Web Sockets, ...• New W3C working group created in 2007 to work on HTML5• WHATWG & W3C editions of HTML5 can have some differences

CommonJS• created in 2009 by Kevin Dangoor as ServerJS on Mozilla Wiki • standards for JavaScript on the server • Narwhal, Helma NG, v8CGI, GPSEE, chiron, Persevere• Renamed CommonJS • command line tools, desktop, addon, or browser implementations • joined by CouchDB, Wakanda, Sproutcore, node.js, RequireJS...• Modules, Packages, and Promises• Binary, FileSystem, System, I/O stream, Socket I/O• Browser like APIs: worker, console, HTTP client

Server-Side JavaScript

Engines• Mozilla SpiderMonkey• Mozilla Rhino• Webkit JavaScriptCore• Google V8• Microsoft Chakra• Opera Carakan

Standards• ECMAScript• CommonJS

Servers• Microsoft IIS• Persevere• Jaxer• node.js• Wakanda• RingoJS• SilkJS

NoSQL Databases• CouchDB• MongoDB• Riak• WakandaDB• ArangoDB• OrientDB

Web Application “1.0”

HTML5 APIs• XMLHttpRequest 2 • Web Cryptography• Blob • ImageData• File / FileSystem • Typed Arrays• Web SQL • Storage Quota• Web Storage • System Information• Web Workers • URL• Web Sockets • WebCL

Async & Sync• XMLHttpRequest(method, url, async)• FileReaderSync()• requestFileSystemSync()• openDatabaseSync()• indexedDBSync.open()• localStorage.getItem()

Web Workers• Dedicated or Shared• No Window, No Document• WorkerGlobal, WorkerUtils• WorkerNavigator, WorkerLocation• postMessage(), onmessage(), onerror()• importScripts()

Concept• Server JS contexts == Workers • multi-threaded -> Dedicated Workers • single threaded EventLoop -> Shared• Server JS contexts === Remote JS Workers

Now & Tomorrow

RingoJS• W3C • Web Worker• CommonJS • Modules • System, fs, binary, IO, Unit Test• Other: console

SilkJS• W3C • XMLHttpRequest• CommonJS • Modules

node.js• W3C via modules • XMLHttpRequest (node-xmlhttprequest) • Web Sockets (node-websocket-client) • DOM (node-o3-fastxml), IndexedDB (perstore)• CommonJS • Modules, Packages• Other: console

Wakanda• W3C • XMLHttpRequest, WindowTimer, • Web Storage, Web Worker, • File, FileSystem, Blob, ...• CommonJS • Modules, System, Unit Test• Other: console

Summary• ECMAScript is already everywhere• Modules: CommonJS already standard, AMD, ECMAScript 6• Many W3C APIs already applicable server-side• Same APIs means • better learning curve • more shared libraries / modules • DRY -> shared Model work Offline

Client and Server JavaScript APIs W3C Community Grouphttp://www.w3.org/community/jseverywhere/

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End-to-end W3C APIs

by Alexandre Morgaut on Oct 27, 2012

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