Object Freezing vs Object.preventExtensions

Developers should use object freezing when they need to enforce immutability for data structures, such as configuration objects, constants, or shared state in applications, to avoid bugs from unintended changes meets developers should use object. Here's our take.

Object Freezing

Nice Pick

Developers should use object freezing when they need to enforce immutability for data structures, such as configuration objects, constants, or shared state in applications, to avoid bugs from unintended changes

Pros

• It is particularly useful in React for props or Redux for state management, where immutable data helps optimize performance through shallow comparisons
• Related to: immutability, javascript-objects

Cons

• Specific tradeoffs depend on your use case

Object.preventExtensions

Developers should use Object

Pros

• preventExtensions when they need to ensure that an object's structure remains fixed, such as in configuration objects, API responses, or when implementing certain design patterns like sealed objects
• Related to: javascript, object-seal

Cons

• Specific tradeoffs depend on your use case

The Verdict

Use Object Freezing if: You want it is particularly useful in react for props or redux for state management, where immutable data helps optimize performance through shallow comparisons and can live with specific tradeoffs depend on your use case.

Use Object.preventExtensions if: You prioritize preventextensions when they need to ensure that an object's structure remains fixed, such as in configuration objects, api responses, or when implementing certain design patterns like sealed objects over what Object Freezing offers.

The Bottom Line

Object Freezing wins

Developers should use object freezing when they need to enforce immutability for data structures, such as configuration objects, constants, or shared state in applications, to avoid bugs from unintended changes