Peeling Away the jQuery Wrapper and Finding an Array
If you haven’t poked around under the hood of jQuery, you might not be aware that when you pass the jQuery function an expression or DOM element it places these elements (or, possibly a single element) into an object, and then this object is returned so that it can be chained. Without getting into the details of chaining, the fundamental concept to remember is this:
Most jQuery methods return the jQuery object itself, which allows methods to be chained.
