Lesson overview · Free interview practice

Build Tools

Master modern build tools and bundlers.

Topics in the full lesson
  • Introduction to Build Tools and Bundlers
  • Getting Started with Webpack
  • Webpack Configuration
  • Code Splitting
  • Tree Shaking
  • Optimizing Performance with Webpack
  • 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.

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TheoryEasy

Bundlers: The Modern Landscape

Question

What is a bundler, and what is the 2025/2026 bundler landscape?

Take a moment to think about this before revealing the answer

Explain your reasoning or try an implementation before comparing answers.

TheoryMedium

The Bundler Pipeline: Entry → Deps → Loaders → Plugins → Output

Question

What is the generic bundler pipeline, and how do Webpack, Vite, and Rollup map onto it?

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Explain your reasoning or try an implementation before comparing answers.

TheoryMedium

Production Build Optimization Checklist

Question

What is the canonical production-build optimization checklist for a bundled frontend app?

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Explain your reasoning or try an implementation before comparing answers.

TheoryMedium

Tree Shaking: How Dead-Code Elimination Works

Question

What is tree shaking, why does it require ES modules, and what defeats it?

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Explain your reasoning or try an implementation before comparing answers.

TheoryMedium

Loaders vs Plugins: The Two Extension Models

Question

What is the difference between loaders and plugins, and how does Rollup unify them?

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Explain your reasoning or try an implementation before comparing answers.

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