Lesson overview · Free interview practice

Code Splitting

Implement efficient code splitting strategies.

Topics in the full lesson
  • Introduction to Code Splitting and Lazy Loading
  • Understanding Dynamic Imports
  • Implementing Code Splitting
  • Lazy Loading Strategies
  • Performance Considerations
  • Tools and Frameworks Support
  • Practical Examples
  • Best Practices
  • Exercises

Practice Problems

Work through a question before revealing its explanation. These questions and answers are free; Premium adds the full lesson walkthrough, examples and implementation detail.

Completion marks record your own progress, not an automatically checked result. The task type does not determine whether it is optional.

TheoryEasy

Code Splitting vs Lazy Loading: Build-Time vs Runtime

Question

What is the difference between code splitting and lazy loading?

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Explain your reasoning or try an implementation before comparing answers.

TheoryEasy

What Code Splitting Buys You

Question

What is code splitting, and what does it buy you in a real frontend app?

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Explain your reasoning or try an implementation before comparing answers.

TheoryMedium

React.lazy + Suspense: The Canonical Component-Splitting API

Question

How do React.lazy and Suspense work together, and what are the gotchas?

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Explain your reasoning or try an implementation before comparing answers.

TheoryMedium

Code-Splitting Patterns: Route, Component, Library

Question

What are the three canonical code-splitting patterns, and when does each apply?

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Explain your reasoning or try an implementation before comparing answers.

TheoryHard

Performance Considerations: Waterfalls, Prefetch, Chunking Granularity

Question

What performance considerations matter when implementing code splitting in production?

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Explain your reasoning or try an implementation before comparing answers.

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