Despite our warnings about the horrors of pregnancy, childbirth, and babies, some of you are still destined to become parents, if you haven't done it already. Congratulations! Now prepare to be terrified, because you have no idea what you're about to face. And we're not even talking about that first diaper change.
jQuery has two usage styles: 1  Via the $ function, which is a factory method for the jQuery object. These functions, often called commands, are chainable as they all return jQuery objects. 2  Via $.-prefixed functions. These are utility functions, which do not act upon the jQuery object directly.
Why Use jQuery? The best features for jQuery is the what you can accomplish with less code than what it would take with JavaScript. The less code you need to write, the more time you save, the less the file size is, and easier to maintain and update. The most common jQuery effects are hide and show, drag and drop, animations and form validation.