Learning jQuery

When you use method chaining in jQuery, it ensures that you never have to use the same selector more than once. Over-using a selector can seriously slow down your code, as every time you call on a selector you're forcing the browser to go looking for it. By combining or "chaining" multiple methods, you can […]

jQuery's built in preventDefault() method is a great way to prevent the default functionality of an element from occurring. It's probably most commonly used to disable links. Maybe you want a certain link only to work under certain conditions (like for example, you only want it clicked if the user is on a desktop sized […]

Many developers like to link to an externally hosted jQuery library, like for example Google's jQuery library (http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js), but the problem with linking to an external jQuery library is that they can be a bit unreliable. If for some reason there are any issues with the server, the script may not be able to be […]

It's a really common practice in jQuery to use the dollar sign ($) prefix with your methods, like this: $(document).ready(function(){ $(#myDiv).slideUp(); }) The above code would make the div with the ID #myDiv slide up when the page loads. But that's not the only way to write that function. Sometimes you might see it written […]