PrepaJS

Beta Access

Elevate your JS Game.

The ultimate interactive companion for mastering Modern JavaScript interviews with hands-on notebooks and precision-engineered quizzes.

Select a module to begin your deep dive.

7 Modules

Master variables, scoping, and fundamental syntax that forms the core of JS.

Deep dive into primitives, complex objects, and advanced type casting.

Unlock the power of prototypes, property descriptors, and object patterns.

Functional programming with arrays, high-order methods, and performance.

Closures, hoisting, context (this), and functional architecture.

Advanced regex, string manipulation, and internationalization.

Maps, Sets, Weak versions, and efficient data handling patterns.

250+

Questions

Notebooks

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Growth