First misunderstanding, then huge semipopularity, and now, respect. Despite its many obvious deficiencies, Java's stupid little brother has gotten something profoundly right. What does the future hold for this duckling?

1. JavaScript:
Your New
Overlord

2. JSON:
The World’s Best Loved
Data Interchange Format

3. JavaScript:
The World’s Most Misunderstood
Programming Language
Java’s stupid little brother

4. The World’s Most Popular
Programming Language

5. The World’s Most Popular
Programming Language
The World’s Most Unpopular
Programming Language

6. It is the language that people use
without bothering to learn it first.
Programming is complicated
business. It should never be
undertaken in ignorance.

7. Java Applets
The biggest failure in the
history of software
1995

8. Java Applets
The biggest failure
in the history of software

11. Ten Days in May
Mocha

12. Java Scheme Self
LiveScript

13. Java Scheme Self
LiveScript
JavaScript

14. Java Scheme Self
LiveScript
JavaScript
JScript

15. Java Scheme Self
LiveScript
JavaScript
CMAS cript
JScript E

16. “Another software technology will
come along and kill off the web,
just as it killed news, gopher, et al.
And that judgment day will arrive
very soon – in the next two to three
years, not 25 years from now.”
George F. Colony
Chairman of the Board and CEO
Forrester Research, Inc. [2000]
http://web.archive.org/web/20001019084041/http://www.forrester.com/ER/Mark eting/1,1503,214,FF.html

17. JavaScript was a failed
language.
It should have died
when Netscape died.

18. JavaScript has Good Parts.

19. Statically scoped first class
functions with lexical closure
var Y = function (le) {
return (function (f) {
return f(f);
}(function (f) {
return le(function (x) {
return f(f)(x);
});
}));
};

20. Prototypal Inheritance
An object
containing
instance data
An object
containing
public methods

21. Beginners, scientists,
and everybody in between

22. How IE8 Spends Its Time
• Average time allocation of the Alexa 100:
Marshalling 7.34%
Format 8.66%
JScript 3.23%
5.05%
HTML 2.81%
Other 2.5%
Layout 43.16% Rendering 27.25%
DOM

23. High Performance
JavaScript Engines

24. Everywhere
• Browser
• Operating Systems
• Databases
• Servers
• Mobile
• Televisions

25. High Performance
Data Structures

26. Securing JavaScript
Caja http://code.google.com/p/google-caja/
ADsafe http://www.ADsafe.org/
DR Ses es-lab.googlecode.com/files/dr-ses.pdf

27. JavaScript: The Universal
Virtual Machine

28. GWT
Java JavaScript
so it can run everywhere

29. spidermonkey.cpp |=>
clang |=>
emscripten |=>
closure |=>
js.js

30. New Languages
• CoffeeScript
• Kaffeine
• Move
• Objective-J
• Sibilant
• ZedScript
• and over a hundred more

31. Old Languages
• C++ • Perl
• C# • Python
• Forth • Rebol
• Haskell • Ruby
• Java • Scala
• Lua • Scheme
• Ocaml • Smalltalk
• Pascal • Tcl

32. A better compilation target.
goto

33. JavaScript:
The World’s Most Important
Programming Language

34. Thank you and good night.