Object's key names

[smus]

const data = { level1: { level2: { level3: 'some data' } } };

Is there a way to get the names of all the keys (at any level) in that object without using a recursion? (level1, level2, level3)

 

 

[Ingolme]

A recursive function is the easiest way to do it, but it's possible to replace any recursive function with an iterative process and stack memory, though I would advise against it since it's messy.

[smus]

Yeah, true, same info is on StackOverflow: different implementatoins of recursive approach. Strange that ES6 doesn't have a built-in function or method for it. Object.hasOwnProperty is only for the upper-level keys which makes it useless for structured objects.

[Ingolme]

I don't see any practical reason to search for all keys at every level inside an object. If they don't build such a feature into the language it's probably to discourage people from doing it.

[justsomeguy]

You would only have a list of keys, you wouldn't know which level they're at.  If there are duplicate keys you wouldn't know either.

If you want to do that though, why is not using recursion a requirement?