I’d love to see some sort of `maxDepth` property on objects.
For `{}`, it would return `0`.
In the case of `{keyOne: true}`, it would return `1`.
For `{keyOne: {anotherKey: false}, keyTwo: false}`, it would return `2`.
My particular use case is validating a JSON payload sent by a user to prevent
abuse. I don’t want to force a particular structure or set of keys, but I do
want to make sure the level of nesting doesn’t get silly.
The code to implement this is fairly short, but looks a bit messy. It’d be
really nice to have a property instead.
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