There is a good chance that out in the "real world", the #1 thing you use Ajax for is sending and receiving JSON data. And for good reason. JSON doesn't presume any visual structure like HTML does. It's just raw data and you can do with it what you will, which is often put it into templates. This offloads some of the work from the servers to the clients (browsers). You can learn more about JavaScript templating in another screencast.

jQuery has a special Ajax function just for getting JSON, appropriately named &.getJSON(). It looks extremely similar to GET:

  function(data) {
    // Success! Do stuff with data.

The difference is that the data object in the callback is a ready-to-rock object full of data you can do whatever you want to with. Likely loop through it append stuff to the page.

So far we've talked about $.get, $.post, and $.getJSON - but it's worth noting that these are all just convenience methods that ultimately call $.ajax. If you prefer being very specific about all your Ajax options, you can use that directly.

Submit a Comment

Posting Code

You may write comments in Markdown. This makes code easy to post, as you can write inline code like `<div>this</div>` or multiline blocks of code in triple backtick fences (```) with double new lines before and after.

Code of Conduct

Absolutely anyone is welcome to submit a comment here. But not all comments will be posted. Think of it like writing a letter to the editor. All submitted comments will be read, but not all published. Published comments will be on-topic, helpful, and further the discussion or debate.

Want to tell us something privately?

Feel free to use our contact form. That's a great place to let us know about typos or anything off-topic.