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From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.lang.javascript
Subject: Re: check for obj nested prop
Date: Fri, 08 May 2020 10:52:29 +0100
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Andrew Poulos <ap_prog@hotmail.com> writes:

> let obj = {a: 1};
> if (a.b.c.d) // throws error

Did you mean if (obj.a.b.c.d) ?

> so I end up doing
>
> if (a && a.b && a.b.c && a.b.c.d)
<cut>
> Is there a way to get the check value of an object's nested property
> without first having to test for all the ascendant properties?

  if (try {obj.a.b.c.d} catch {})

might do what you want.

-- 
Ben.