Feeds

Mozilla Labs pops out JavaScript language tool for coders

Two heads are better than one. Just ask Beeblebrox

Securing Web Applications Made Simple and Scalable

Mozilla has released a JavaScript engine strictly for testing purposes to allow web developers to gain deeper access to – and better understanding of – the code underpinning its browser.

The Narcissus engine and Zaphod script look-up tool have been added to Mozilla Labs to help the open source outfit develop new ideas for the JavaScript language.

“What features should we add to JavaScript? What should the syntax/semantics be? What practical issues will come up that we have not considered so far? With Narcissus and Zaphod, we can more easily answer these questions,” said Mozilla’s Tom Austin.

“In programming language (PL) research, we like to write up fancy evaluation rules containing lots of Greek letters. Unfortunately, these rules tend to be inscrutable to anyone who isn’t a PL researcher. Even for PL researchers, there is something unsatisfying about seeing a bunch of rules on a piece of paper.”

By releasing the Narcissus Javascript engine, which is based on simpler code and is much less affected by the changing browser code base, Mozilla hopes to get more people testing the software.

Meanwhile, Zaphod doggedly searches for scripts with a tag of “application/narcissus” and parses them with Narcissus. Mozilla’s factory line JavaScript engine SpiderMonkey ignores the tag.

“But we might also want to see how the implementation would work on a pre-existing page. Click on the mozilla icon in the bottom right corner and Narcissus will be set as the default JavaScript interpreter. After experimenting, click on the icon again and SpiderMonkey will be reset as your JS implementation,” said Austin.

“Zaphod/Narcissus cannot yet handle some of the more JavaScript-heavy pages, but it can handle enough to be a valuable research tool for JavaScript language hackers.”

This way for more about the JavaScript experiment. ®

Bridging the IT gap between rising business demands and ageing tools

More from The Register

next story
NO MORE ALL CAPS and other pleasures of Visual Studio 14
Unpicking a packed preview that breaks down ASP.NET
DARPA-derived secure microkernel goes open source tomorrow
Hacker-repelling, drone-protecting code will soon be yours to tweak as you see fit
Cheer up, Nokia fans. It can start making mobes again in 18 months
The real winner of the Nokia sale is *drumroll* ... Nokia
Put down that Oracle database patch: It could cost $23,000 per CPU
On-by-default INMEMORY tech a boon for developers ... as long as they can afford it
Google shows off new Chrome OS look
Athena springs full-grown from Chromium project's head
Apple: We'll unleash OS X Yosemite beta on the MASSES on 24 July
Starting today, regular fanbois will be guinea pigs, it tells Reg
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
prev story

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.