convict
Featureful configuration management library for Node.js (nested structure, schema validation, etc.)
has-value
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
union-value
Set an array of unique values as the property of an object. Supports setting deeply nested properties using using object-paths/dot notation.
flat
Take a nested Javascript object and flatten it, or unflatten an object with delimited keys
