jQuery JSON

For those of you who like jQuery but cannot find any sensible way of interacting with JSON (Java Object Notation), here is a solution for you.

I come up with this solution while developing several GNUCITIZEN application, including the latest XSSDB and Backframe. You can get the code from over here, although this might not be the latest version as I am constantly modifying the script and including it in different kind of projects.

In order to call JSON you have to do the following:

$.json('http://path/to/json?callback={callback}', function yourFunction () {
  [your code here]
});

As you can see, everything is very jQuery like so you shouldn’t have any problems.

Comments

pdp responds:

.mario, the getJSON function returns XMLHttpRequest object which is unsuitable when you want to perform cross-domain JSON communication. This is the reason why I needed to write this module.

.mario responds:

Ah – I see – i commented pretty late yesterday evening and oversaw the JSOD-JSON aspect (JS on demand)

pierre responds:

i don’t follow under what conditions yourFunction() is executed. perhaps after the given callback is run? could you provide a less brief usage example? :0)

should one clean up in the callback and remove the script object from head? $("head script:last-child").remove();

pdp responds:

pierre,

the function is executed when JSON returns and evaluates withing the browser. As for the script object, we can do that but I found that sometimes Firefox is too picky and ends up throwing errors… I don’t know why.

Maxime Haineault responds:

FYI, since jQuery 1.2 getJSON can do cross domain communications.

http://docs.jquery.com/Release.....g_JSONP.29

What I find is really lacking in the jQuery framework is methods to manipulate JSON itself. I would like to be able to do things like this:

$.JSONdecode('[{a:"b"},{c:"d"}]');
$.JSONenconde([{a:"b"},{c:"d"}]);

Even the getJSON methond in jQuery use a simple eval to parse the JSON.. It might sound trivial, but imho it’s not the *best* solution.

GeekFG responds:

Sorry, but the link is broken, can you fix this ? Thanks !! :)

pdp responds:

the link should be fixed now!

ZK@Web Marketing Blog responds:

I have been getting familiar with jQuery recently and the more I get into it, the more I’m impressed with it. When I first heard about jQuery I was definitely intimidated by it since I had no previous background with javascript, but I soon realized once you get the basics down its not very hard to pull of some neat effects.

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