How do closures enable Data encapsulation/ Data Privacy

Q: How do closures enable Data encapsulation/ Data Privacy

Difficulty: 5/10

closures, data encapsulation, module pattern

Closures enable encapsulation and data hiding, allowing you to create modules with private variables and methods. This is a fundamental aspect of the Module Pattern in JavaScript, which helps prevent accidental external access to internal data.

Scenario Questions

0-2 years experience

1Write a function that returns an object with `increment` and `getValue` methods, where the internal counter cannot be accessed directly. How would you implement it using closures?
2If you create a variable inside a function and return an inner function that uses it, can code outside the outer function modify that variable? Explain what happens.

2-5 years experience

Follow-up Questions