Converting 1 array of objects into a nested array of array of objects

Say I have this:

var arr = [
    {type:"orange", title:"First"},
    {type:"orange", title:"Second"},
    {type:"banana", title:"Third"},
    {type:"banana", title:"Fourth"}
];

And I’d like to get to this.

[[{type:"orange", title:"First"},
{type:"orange", title:"Second"}],

[{type:"banana", title:"Third"},
{type:"banana", title:"Fourth"}]]

I’ve seen a lot for getting to this:

{orange: 
[[{type:"orange", title:"First"},
{type:"orange", title:"Second"}], 
banana: 
[{type:"banana", title:"Third"},
{type:"banana", title:"Fourth"}]}

But it doesn’t help my situation, I need it to be arrays inside an array.
Any help will be greatly appreciated