When learning a new topic people often make the same mistakes and follow the same bad practices as each other. It usually follows by them realising that what they’ve been doing for a few days/weeks/months is a bad way of doing it and wondering how they didn’t realise earlier.
In this article we’ve put together a (non-exhausted!) list of a few of the things we’ve picked up and things we recommend you do when starting out with Ext JS (hey, even you veteran developers might learn something new!). These things have come up through our own experience; through seeing and replying to the same issues on the forums again and again; and just general good programming practices.
Hopefully this will jump you a few rungs up the ladder of learning Ext JS and help you avoid falling into the usual traps!
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Overview
Integrating JS Builder 3 with Eclipse or Aptana may save you some time building your Javascript application for a testing or production environment.
The aim of JS Builder is, ultimately, to make your website or application load quicker. It does this by combining your Javascript and CSS files, minifying them and outputting them to fewer files. You may, for example, opt to have one CSS file, and two Javascript files (Ext-all.js and app.js). This results in far fewer requests to your server which, although the individual file sizes are larger, boosts performance.
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I recently upgraded to Windows 7 and found that running a website using the ASP.NET Development Server on Visual Studio 2008 is really slow!
An Ext JS web application I’m working on at the moment was sometimes taking up to a minute to load as I don’t build the javascript files every time I edit the code. I was even finding that images were taking between 2 and 3 seconds to load.
Having tried altering a few settings and playing with my anit-virus I turned to search and it lead me to reading this:
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