How can jQuery do method chaining? [duplicate]

Answer 1

A function isn't anything special, you can return a function inside an object. For a quick example:

function $() {
    return {
        html: function() {
        }
    };
}

$().html(); // You just called the function!

jQuery doesn't have anything special in it. When you call a function in jQuery that doesn't return a value, it usually returns the jQuery object it was called on, like so:

var obj = {
    doSomething: function() {
        return this;
    },
    doSomethingElse: function() {
        alert('Hi!');
    }
};

obj.doSomething().doSomethingElse(); // Alerts "Hi!"

because again, it's just an object.