Javascript Object Question

Question

I'm a beginner w/ Javascript. I'm looking at the following code that someone else wrote:

function MeetingPage()
{
   MeetingPage.colors = new Object();
}

...

var meeting = new MeetingPage();

From what I've seen, I believe that the MeetingPage function creates an object that later someone holds onto in meeting. What is the MeetingPage.colors? Is the MeetingPage prefix some kind of global? Is it a "this" pointer of some kind?

Any suggestions would be appreciated.

Answer 1

It's actually just bad code. MeetingPage.colors = new Object(); is setting a property called colors on the MeetingPage function, i.e:

function MeetingPage(){ }
MeetingPage.colors = {};

Which is perfectly valid since all functions in JavaScript are objects. The problem is that if you have multiple instances of meeting page:

var meeting1 = new MeetingPage();
var meeting2 = new MeetingPage();

The code you posted will reset colors. It should either should be written as this.colors = {}, or it should be set outside of the function as in my first snippet.