Setting Properties in JavaScript Object Which Operator to Use

I'm confused by the = vs. : when assigning a value to a property in an object

Now I know that there are a couple ways to create an object:

• Object Literal


• Object Constructor

With an object Literal you would use ":" to assign a value to a property:

var myObject = {firstName: "John", lastName="Smith" };

There we are using ":" to set the value to the property.

I also know a function itself is an object. And you can probably expose public properties from there as part of the function being an object?

So is it if you're assigning a function to a property that you'd use "="? I am assuming yet but what about something like this:

var phantom = require('phantom');

var World = function World(callback) {

    phantom.create("--web-security=no", "--ignore-ssl-errors=yes", { port: 12345 }, function (ph) {
        var phantomProcess = ph;

        createBrowserPage = function(){
            phantomProcess.createPage(function(page) {

                this.headlessPage = page;
            })
        };
    });

    callback();
};

module.exports.World = World;

I assume I have this right in that I want to expose createBrowserPage through exports. I wouldn't use createBrowserPage: and use a ":" instead of "=" to assign that anonymous function to the createBrowserPage property right?