Re: Newbie AJAX Question

technically, yes it's ajax, since you're loading additional data asynchronously via javascript.

xmlhttprequest enables you to send requests, typically to a web-service, through the internet via javascript.

the example you've included is loading additional data via a json file (effective a text file?), which is fine.  but if that's the case, why not just load your product data directly onto the page?

On Tue, Dec 20, 2011 at 7:15 AM, wije <jenswirf@gmail.com> wrote:

I fairly new to JS and I need to do some AJAX injections, both JSON-
data and some html/css/javascript local-domain.

I can manage this using jQuery || Zepto but as I am developing for
mobile I'd love to avoid using plugins alltogether and do a light-
weight pure javascript version.

I cobbled the code below together for the JSONP and it works nicely,
but my newbie question is:

Is this even AJAX? What is the difference between what I've done here
and say an XMLHttpRequest? Any issues with this method?

Thanx



// script insertion function
function testJSONP() {

//remove old instance of script reference
if (old =  document.getElementById('jsonp_ref')) {
old.parentNode.removeChild(old);
}

//fetch new data
var url = 'products.json';
var script = document.createElement('script');
script.setAttribute('src', url);
script.setAttribute('id', 'jsonp_ref');

// inject data into DOM
document.getElementsByTagName('head')[0].appendChild(script);
}

// this is the funciton that the jsonp-file calls
function jsonpdata(data) {

       //do something with the data
  for (var i in data.products) {
               console.log(i);
       }
}


<button onclick="testJSONP();">getJSON</button>

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