Squash Object

Requirements

• Export squashObject as named and default. Take an acyclic plain object and return a new plain object containing dot-delimited leaf paths.
• Recursively expand own enumerable properties of non-null plain objects. Arrays, null, and primitive values are leaves.
• Preserve empty nested objects as leaves; an empty root returns {}. Keep leaf values by reference, including arrays and empty objects.
• Input keys are non-empty and do not contain dots. Do not mutate the input. Safely support property names such as __proto__, constructor, and prototype.
• Symbols, prototypes, class instances, and cyclic inputs are outside the contract.

Examples

Input: squashObject({ user: { name: "Ada", settings: { theme: "dark" } } });
Output: { "user.name": "Ada", "user.settings.theme": "dark" }