JavaScript Map vs Object
| Feature | Map | Object |
|---|---|---|
| Key Types | Any data type, including objects | Limited to strings and symbols |
| Key Equality | Uses strict equality (===) |
Uses loose equality (==), auto-converts to strings |
| Iteration | Supports easy iteration (for...of, forEach) |
Iteration through keys/values possible (for...in, Object.keys()) |
| Size | Has a size property |
No direct size property, count keys manually |
| Performance | Efficient for frequent additions/removals | Efficient for simple data structures |
| Methods | Provides various built-in methods (set, get, delete, has, etc.) |
Limited built-in methods for manipulation |
| Key Order | Maintains the order of insertion | No guaranteed order of keys (may vary across JavaScript engines) |
| Use Cases | Versatile, supports various key types | Simple key-value pairs, plain data structures |
Map vs Object in JavaScript
In JavaScript, both map and object stores the key-value pairs but differ on some features and use cases.
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