ScratchYourself.com web development, from scratch

jQuery is an incredible Javascript library. It allows programmers, as well as other web developers with less programming experience, to develop high-end Javascript and AJAX features on their websites. Many situations require or benefit from software written from scratch, but other situations do not. For most Javascript functionality, writing your code from scratch isn’t worth it or necessary, and that’s where jQuery comes in. jQuery isn’t necessarily easy. The more customization you want, the more specific your requirements, the longer it will take you to get it right. But even if you have the time and experience, jQuery doesn’t do everything for you.

Many people are curious about how to perform a full AJAX file upload using jQuery. Some users have noted that HTML 5 supports AJAX file uploads, however most websites aren’t written in fully support HTML 5. Other users have also shown exactly how to do this using methods such as hidden iframes, and a Javascript XMLHttpRequest() object.
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jQuery’s .load() method supports an optional callback function called when the request is complete. However, you might find that the complete callback function doesn’t work properly.

The jQuery .load() documentation shows 2 optional arguments to the .load() method.

The first optional argument is “data”, which is described as “A plain object or string that is sent to the server with the request.”

The second optional argument is “complete”, which is described as “A callback function that is executed when the request completes.”.

The examples on that page present some confusion, by showing this example:


$('#result').load('ajax/test.html', function() {
alert('Load was performed.');
});


The problem with that example is that the “complete” callback function is shown as the 2nd argument, not the 3rd. (more…)