Js Web 应用程序示例/教程

因此，我看完了道格拉斯·克罗克福特关于 Javascript 的优秀系列，在最后一集(到目前为止)中，漏洞解释了为什么 Node.js 是一个近乎完美的服务器端代码解决方案。

他谈到了保持状态，而不是在数据库中，而是在 Node.js 中运行的闭包中，他还指出模板系统(如 JSP、 PHP 和 ASP)对于更复杂的 Web 应用程序来说是一个糟糕的抽象，而 Node.js 提供了一个解决方案。

我已经准备好加入，但是我找不到任何使用这种模式的 Web 应用程序的例子，也找不到任何关于如何实现这一点的书籍或教程。我说的不是 简单的应用，而是使用克罗克福德在演讲中提到的模式。任何人都知道我在哪里可以找到一些用 Node.js 编写的 Web 应用程序的教程/例子(是的，我知道 盖迪和 ExpressJ，但是它们似乎并没有遵循克罗克福德所说的完全不同的模式，更像是在 Node.js 上获得了 Railsy 的体验)。

未来三年的注释: 看起来 特快，盖迪，帆，北海巨妖等等都是 Rails/Symfony/Spring 框架从 Ruby/PHP/Java 的重新实现。而像 帽衫和 流星这样的东西是在尝试一个全新的范式。KOA看起来很有意思，但是离可用还有一段距离，但是看起来它是建立在 javascript 的优势和过去 MVC 应用的历史之上的。3年过去了，对于 Nodejs 来说，这仍然是令人兴奋的时刻，即使它不再是新的热门话题。至少现在有很多现实世界中使用的 Node 示例..。

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The Node Knockout competition wrapped up recently, and many of the submissions are available on github. The competition site doesn't appear to be working right now, but I'm sure you could Google up a few entries to check out.

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Update

Dav Glass from Yahoo has given a talk at YuiConf2010 in November which is now available in Video from.

He shows to great extend how one can use YUI3 to render out widgets on the server side an make them work with GET requests when JS is disabled, or just make them work normally when it's active.

He also shows examples of how to use server side DOM to apply style sheets before rendering and other cool stuff.

The demos can be found on his GitHub Account.

The part that's missing IMO to make this really awesome, is some kind of underlying storage of the widget state. So that one can visit the page without JavaScript and everything works as expected, then they turn JS on and now the widget have the same state as before but work without page reloading, then throw in some saving to the server + WebSockets to sync between multiple open browser.... and the next generation of unobtrusive and gracefully degrading ARIA's is born.

Original Answer

Well go ahead and built it yourself then.

Seriously, 90% of all WebApps out there work fine with a REST approach, of course you could do magical things like superior user tracking, tracking of downloads in real time, checking which parts of videos are being watched etc.

One problem is scalability, as soon as you have more then 1 Node process, many (but not all) of the benefits of having the data stored between requests go away, so you have to make sure that clients always hit the same process. And even then, bigger things will yet again need a database layer.

Node.js isn't the solution to everything, I'm sure people will build really great stuff in the future, but that needs some time, right now many are just porting stuff over to Node to get things going.

What (IMHO) makes Node.js so great, is the fact that it streamlines the Development process, you have to write less code, it works perfectly with JSON, you loose all that context switching.

I mainly did gaming experiments so far, but I can for sure say that there will be many cool multi player (or even MMO) things in the future, that use both HTML5 and Node.js.

Node.js is still gaining traction, it's not even near to the RoR Hype some years ago (just take a look at the Node.js tag here on SO, hardly 4-5 questions a day).

Rome (or RoR) wasn't built over night, and neither will Node.js be.

Node.js has all the potential it needs, but people are still trying things out, so I'd suggest you to join them :)

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The closest thing is likely Dav Glass's experimental work using node.js, express and YUI3. Basically, he explains how YUI3 is used to render markup on the server side, then sent to the client where binding to event and data occurs. The beauty is YUI3 is used as-is on both the client and the server. Makes a lot of sense. The one big issue is there is not yet a production ready server-side DOM library.

screencast

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最佳答案

I would suggest you check out the various tutorials that are coming out lately. My current fav is:

http://nodetuts.com/

Hope this helps.

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DailyJS has a good tutorial (long series of 24 posts) that walks you through all the aspects of building a notepad app (including all the possible extras).

Heres an overview of the tutorial: http://dailyjs.com/2010/11/01/node-tutorial/

And heres a link to all the posts: http://dailyjs.com/tags.html#nodepad


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