Objects

Summary

Key-value collections that model real-world entities — the most fundamental data structure in JavaScript, with shorthand syntax, destructuring and spread. Objects can represent structured application data and behavior, and understanding references, mutation, copying, and property lookup is essential when working with them.

• 1Practice object destructuring and the spread operator (`{...obj}`). Test it with at least one normal case and one edge case so you can explain the behavior confidently.
• 2Learn `Object.keys`, `Object.values` and `Object.entries`. Focus on understanding the underlying reason it works, not only memorizing the definition.
• 3Try computed property names (`{[key]: value}`).