Use of {} in JavaScript?

Question

Very simple question but I'm quite new to JS and this is not easy to search.

If I see a line like this:

var colours = {}, r, g, b;

I get that it's just a declaration for 3 vars, but what does the {} bit mean? I can't see anywhere that gives me an idea as to what this is declaring?

Thanks!

Answer 1

It declares new object and equivalent to new Object();

Answer 2

 var colours = {}, r, g, b;

This declares 4 variables which is the same as

   var colors = {}; // this is an empty object like, var colors = new Object();
   var r; // undefined
   var g; // undefined
   var b; // undefined