Object.keys, Object.values, Object.entries, Object.assign, spread with objects, shallow copy vs deep copy, Object.freeze, and Object.seal
Object helpers are useful for inspection and copying, but most built-in copy patterns are still shallow.
- `Object.assign` and spread are shallow
- `freeze` and `seal` change mutability rules
- Entries are useful for iteration
Object.keys, Object.values, Object.entries, Object.assign, spread with objects, shallow copy vs deep copy, Object.freeze, and Object.seal