Question

Can anyone explain the meaning of this code?

if (data.result) {
    $('ul#intlist').append(data.content);
}

Answer 1

This code is basically checking whether some data exists if(data.result) and then appends the content of the data to the end of an ul with an ID of intlist

So if you had an UL as follows:

<ul id="intlist">
   ...
</ul>

Then the jQuery code would be inserting the result of data.content to this list.

In jQuery you can use CSS selectors to gain access to the elements you want. If you were to do $('ul') this would give you access to all ul’s on the page. If you were to do $('#intlist') this would give you access to an element with an id of “intlist”. You can combine these selectors as in your code above so that $('ul#intlist') is getting an ul with the id of “intlist”. The hash # symbol is used to obtain items by Id.

You can read more about jQuerys append() method here: http://api.jquery.com/append/