C# 6.0 has just been released and has a new nice little feature that I'd really like to use in JavaScript. They're called Null-conditional operators. These use a ?. or ?[] syntax.

What these do is essentially allow you to check that the object you've got isn't null, before trying to access a property. If the object is null, then you'll get null as the result of your property access instead.

int? length = customers?.Length;

So here int can be null, and will take that value if customers is null. What is even better is that you can chain these:

int? length = customers?.orders?.Length;

I don't believe we can do this in JavaScript, but I'm wondering what's the neatest way of doing something similar. Generally I find chaining if blocks difficult to read:

var length = null;

if(customers && customers.orders) {

    length = customers.orders.length;

}