In a JavaScript function I would like to return if a given value is null.

While this works:

```
const A = this.B;

if (!A) {
   return;
}

// More code...

```

I would like to know if there's a simpler form to do this:

These don't work:

```
const A = this.B || return;

// More code...

```

```
const A = this.B;

!A || return;

// More code...

```

Is there a possible shorthand for this?