Challenge Library
Coding Challenges
5,893 curated questions across every arena — browse by topic, then jump into a live 3-minute battle to put them to the test.
Filter by type
Filter by difficulty
Popular topics
10 challenges matching your filters
Clear topic filter- Multiple ChoiceBeginner
[React] Expressions JavaScript XML syntax
qareactreactqa - Multiple ChoiceBeginner
[React] Conditionals JavaScript XML syntax
qareactreactqa - Multiple ChoiceBeginner
[React] Fragments JavaScript XML syntax
qareactreactqa - Multiple ChoiceBeginner
[React] className JavaScript XML syntax
qareactreactqa - Multiple ChoiceBeginner
[React] Self-closing JavaScript XML syntax
qareactreactqa - Multiple ChoiceBeginner
[React] Declare State hook
qareactreactqa - Multiple ChoiceBeginner
[React] Updater State hook
qareactreactqa - Multiple ChoiceBeginner
[React] Batching State hook
qareactreactqa - Multiple ChoiceBeginner
[React] Lazy init State hook
qareactreactqa - Multiple ChoiceBeginner
[React] TypeScript State hook
qareactreactqa
Practice now, dominate the arena
Every challenge here is drawn from the live Code Royale pool. Review a question, then head to the arena to answer under pressure against a real opponent — 3-minute matches, Elo ranking, and badge tiers on the line.