Entries tagged javascript in 2011
Filters: Type: entry × Year: 2011 × javascript × Sorted by date
Does Quora use node.js?
Quora use their own event-based Python web framework which they’ve talked about quite a bit, called LiveNode. I believe it’s based on Tornado, the open source Python evented framework/appserver that was open sourced by Facebook after they acquired FriendFeed.
[... 49 words]Why would someone browse the web with JavaScript disabled?
Security conscious users (who understand the implications of XSS and CSRF attacks) sometimes disable JavaScript completely, or use a tool like the NoScript extension to disable it for all sites and only re-enable it on a small whitelist of sites that they trust.
[... 67 words]Are there any wikis that allow the use of JavaScript on wiki pages?
Such a wiki would be grossly insecure. That said, take a look at TiddlyWiki—it’s implemented entirely in client-side JavaScript and allows plugins to be implemented by pasting JavaScript in to a textarea.
[... 53 words]Why does Facebook chat use subdomains so aggressively?
Probably because it involves long-running connections. Browsers have a limit on the number of connections you can have open to the same domain at the same time (I think it’s 8 in most browsers these days). If Facebook chat opened a connection to www.facebook.com and you opened up 8 Facebook windows you would no longer be able to navigate to any more Facebook pages, since all 8 connections would be taken up by the long lived chat connections. By connecting to a different subdomain for each connection this problem can be avoided.
[... 107 words]What are the reasons that make jQuery more popular than MooTools?
MooTools is the only major JavaScript library that still thinks extending the prototype of built-in JavaScript objects is a good idea.
[... 44 words]What are the JSON security concerns in web development?
Be very careful when implementing JSON-P for authenticated actions—evil third party sites could assemble URLs to your user’s private data and steal it. This attack has worked against Gmail in the past.
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