Syntax

Objects come in two forms: the declarative (literal) form, and the constructed form.

The literal syntax for an object looks like this:

var myObj = {
    key: value
    // ...
};

The constructed form looks like this:

var myObj = new Object();
myObj.key = value;

The constructed form and the literal form result in exactly the same sort of object. The only difference really is that you can add one or more key/value pairs to the literal declaration, whereas with constructed-form objects, you must add the properties one-by-one.

Note: It’s extremely uncommon to use the “constructed form” for creating objects as just shown. You would pretty much always want to use the literal syntax form. The same will be true of most of the built-in objects (see below).