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JavaScript Technology practice

JavaScript Exercises

Practice your JavaScript knowledge with focused quizzes and code-completion challenges covering the language from bindings and expressions upward.

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69 total exercises Focused practice

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JavaScript Code Completion Exercises

32 exercises

Complete focused JavaScript snippets as you learn variables, expressions, control flow, functions, and beyond.

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JavaScript Quiz Exercises

37 exercises

Test your JavaScript knowledge with focused quiz exercises.

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Latest exercises

A mixed stream of the newest exercises, with the practice mode clearly labeled.

69 exercises
  1. Quizzes JavaScript Exercises JavaScript Weak References & FinalizationRegistry — Quiz Check your understanding of weak liveness, WeakRef, FinalizationRegistry, unregister tokens, and nondeterministic cleanup.
  2. Quizzes JavaScript Exercises Modern ECMAScript Update Pass — Quiz Check your understanding of recent standardized ECMAScript additions and their ownership in the curriculum.
  3. Quizzes JavaScript Exercises JavaScript Explicit Resource Management — Quiz Check your understanding of using, await using, disposal protocols, disposable stacks, and deterministic resource lifetimes.
  4. Quizzes JavaScript Exercises JavaScript Execution Model: Contexts, Realms, Jobs & Agents — Quiz Check your understanding of ECMAScript execution contexts, Realms, Jobs, agents, and host boundaries.
  5. Code completion JavaScript Exercises JavaScript Weak References & FinalizationRegistry — Code Completion Practice WeakRef, FinalizationRegistry, unregister tokens, and safe weak-lifetime handling.
  6. Code completion JavaScript Exercises Modern ECMAScript Update Pass — Code Completion Practice selecting modern standardized ECMAScript APIs.
  7. Code completion JavaScript Exercises JavaScript Explicit Resource Management — Code Completion Practice using declarations, disposal protocols, and disposable stacks.
  8. Code completion JavaScript Exercises JavaScript Execution Model: Contexts, Realms, Jobs & Agents — Code Completion Practice execution-model concepts with small JavaScript completions.

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