Learning ExtJS4 [closed]_问答_开发者_运维开发者技术经验分享

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I'd like to use ExtJS4 for my next project. However, I'm new to Ext and not that well versed in Javascript's finer points either.

There are a couple good books about ExtJS3 available. Should I learn from those old books first and then apply the knowledge to v4 or has the API changed so much that there is no point in learning the old one first?

If not, what's the best way to learn for an Ext newbie?

If you're wanting to learn ExtJS 4 right now then you're going to struggle for any good books on the subject because its only about 6 weeks since it was released.

There are great guides on the Sencha Website on how to migrate from ExtJS 3 -> 4 (this one for example) which might help you along the way if you choose to tackle 3 before 4.

In my honest opinion, the quickest way to learn ExtJS is to pick an example from the Sencha website and have a play around with it.

ExtJS 3 is a lot easier to learn than ExtJS 4 in my humble opinion. I've been using ExtJS for 3 years and thought that 4 was a big switch in thinking.

I finally completed a Tutorial series that demonstrates how to use the new MVC pattern and associations classes of ExtJS-4 with CouchDB by means of Peter Muller's software patch. The series includes an introductory write-up, several video screencasts, and some other resources. You can read all about it and view the screencasts here:

http://averydc.com/ee/index.php/blog/couchdb_extjs4_a_winning_combination

I probably made some mistakes and perhaps mis-spoke here and there, so please feel free to offer constructive criticism. You can post comments on my Blog post. My intention is to help both CouchDB users and/or ExtJS-4 users get a jump start with building an MVC client/server CRUD application using document databases as an alternative to relational databases.

Peter Muller created a software patch for ExtJS-4 and Sencha Touch that makes working with de-normalized databases much easier. I find it is a very maintainable solution for me. If Peter's software patch is something that will work for you, please request from Sencha devs that the patch be integrated into an official release of ExtJS-4 and Sencha Touch in the future. The thread is being watched by Ed Spencer, as he is curious to see the demand. To add your voice, get the patch, or report issues, please post a comment in Peter's thread here:

http://www.sencha.com/forum/showthread.php?127547-Sencha-Platform-denormalized-Data-patch&highlight=couch

Hope this fills a need... Thanks.

I'm also new to Ext and decided to start with Extjs 4 (However, we use extjs 2 in our projects at work!).

Last week I finally got the book Ext JS 4 First Look by Loiane Groner and took a look at it with the hope to find it a useful resource for learning extjs and get over it. But after a bit skimming through, I found out that the book is only suitable for switchers from Extjs3 to Extjs4 and is of no help to newcomers.

IMHO, learning with playing around with examples only gives you experience but you would gain no insight(But is the fastest way as Jaitsu indicated). In order to become an expert, you need to be an experienced develper with a great insight! So my suggestion is to learn extjs 3 from a book and then read Groner's book and begin playing around with the exercises simultaneously.

I bought the book directly from the Publisher: http://www.packtpub.com/ext-js-4-first-look/book

They even have an option of buying an e-book

Apart from ExtJS 4 first look https://www.packtpub.com/ext-js-4-first-look/book

there are couple of more books here:

ExJS in Action Second Edition covers ExJS 4.0 http://manning.com/garcia3/

http://www.packtpub.com/sencha-ext-js-4-web-application-development-cookbook/book

Book on extjs4 http://www.amazon.com/Ext-JS-4-First-Look/dp/1849516669/ref=sr_1_1?ie=UTF8&qid=1330388504&sr=8-1