Autocompletion for Javascript objects (Object, Array) does not work without "new" keyword

In a .js file, declaring a variable the following way offers autocompletion for "board":

var board = new Array(10);

However, doing the same without the "new" keyword does not work:

var board = Array(10);
// no autocompletion

Since the new keyword is not strictly required (stuff works without it), it would be nice to have autocompletion for vars declared also without the new keyword.

The problem is not just with Array, but also with Object. Additionally, if you declare a variable in JSON, e.g var foo =

, you get no autocompletion either at the moment.