jQuery Reference

Quick Reference

The .getJSON() method is used to get JSON data using an AJAX HTTP GET request.

<!-- html element to place output -->
<p id="my_output"></p>
// on button click get some info and place it in the HTML element
$('button').click(function() {
    $.getJSON('test.js', function(result) {
        $.each(result, function(i, field) {
            $('my_output').append(field + ' ');
        });
    });
});

Syntax

$(selector).getJSON(url,data,success(data,status,xhr))

Note

It is generally good practice to place your jQuery code/function inside the document load function so that the action takes place ONLY after the document has finished loading. This ensures that all of the page elements that you may be selecting are in place before running the code on them.

Parameters

ParameterDescription
URLSpecifies the URL to send the request to (required)
dataSpecifies data to send to the server
success(data,status,xhr)Specifies a function to run if the request succeeds

Additional parameters:
  • data - contains the data returned from the server
  • status - contains a string containing request status ("success", "notmodified", "error", "timeout", or "parsererror")
  • xhr - contains the XMLHttpRequest object

jQuery Notes:

  • To use jQuery on your site, it must first be downloaded from the official jQuery site and linked to in your document <head>, or linked to via a CDN in your document <head>
  • It is generally good practice to place your jQuery code/function inside the document load function so that the action takes place ONLY after the document has finished loading
  • When using jQuery, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.