Enlarge indentation in functional programming

Recently, I was learning functional programming, and I happened to notice in this book, the author uses eight widths of indentation all the time. To be honest, that’s not the coding styled I would like to read/code, and I wasn’t very comfortable reading that enlarged indentation.

I believe that was the arrow function and functional programming thing going on.

Consider the following code

const findLUSlength =
  (a,b)=>
    a===b
    ? -1
    : Math.max(a.length, b.length)​

I wrote those codes hours ago, now I am converting it to 8 width indentation:

const findLUSlength =
        (a,b)=>
                a===b
                        ? -1
                        : Math.max(a.length, b.length)​

It looks more straightforward to me, my eyes feel more focused on a ​single function-level scope, and that could be necessary for codes without curly braces.

But the cons come at the same time: it’s much easier to exceed the typical width limit. Which makes it less readable.

I’d stick to less indent for Javascript, and keep it flowing downwards.