Pragmatic Guide to JavaScript
If you’ve been payinge v e n minimalattention to JavaScript these past few
years, you’ve heard this before: it’s the Next BigLanguage.Oncethe province
of half-baked implementations and useless scrolling messages,it has become
a world-class, dynamic, object-orientedlanguage with super-fast implemen-
tations onthe client and server sides.
Onthe one hand, JavaScript’s designersare endowing it with a new healthy
dose of power,through the EcmaScript 5 (ES5) specification. Onthe other
hand, kick-ass engines (such as V8, JavaScriptCore, SpiderMonkey,Rhino,
and Carakan) and emergent standards and technologies (with CommonJS
1
and Node
2
in the lead) makeit usable both in browsers and as stand-alone,
powerful architecturesonthe server. Even the upcomingInternet Explorer 9
is upping its JavaScriptgamewith the promise of huge speedboosts.
Not only is JavaScript a powerful, dynamic language, b u t it now has a rich
ecosystem of professional-grade development tools, infrastructures, frame-
works, and tool kits. It is versatile, fast, and very well suited to a wide range
of programming tasks, especially whenit comes to web-basedapplications
and services.
It’s time to dive in!
years, you’ve heard this before: it’s the Next BigLanguage.Oncethe province
of half-baked implementations and useless scrolling messages,it has become
a world-class, dynamic, object-orientedlanguage with super-fast implemen-
tations onthe client and server sides.
Onthe one hand, JavaScript’s designersare endowing it with a new healthy
dose of power,through the EcmaScript 5 (ES5) specification. Onthe other
hand, kick-ass engines (such as V8, JavaScriptCore, SpiderMonkey,Rhino,
and Carakan) and emergent standards and technologies (with CommonJS
1
and Node
2
in the lead) makeit usable both in browsers and as stand-alone,
powerful architecturesonthe server. Even the upcomingInternet Explorer 9
is upping its JavaScriptgamewith the promise of huge speedboosts.
Not only is JavaScript a powerful, dynamic language, b u t it now has a rich
ecosystem of professional-grade development tools, infrastructures, frame-
works, and tool kits. It is versatile, fast, and very well suited to a wide range
of programming tasks, especially whenit comes to web-basedapplications
and services.
It’s time to dive in!
What’s ThisBook About,and WhoIs It For?
This bookis not really intended to teach you “JavaScript the language.” For
one thing, the language itself is not very complicated, so if you have prior
experience in programming any reasonably common language—even if it’s
just the basics (variables, loops, and so on)—you’ll get your bearings easily
enough. Y o u don’t need to actually know some JavaScript already (although
it could help), and you certainly don’t need to be any sort of programming
guru.
one thing, the language itself is not very complicated, so if you have prior
experience in programming any reasonably common language—even if it’s
just the basics (variables, loops, and so on)—you’ll get your bearings easily
enough. Y o u don’t need to actually know some JavaScript already (although
it could help), and you certainly don’t need to be any sort of programming
guru.
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