All challenges
JavaScript challenge · Frontend
Event Emitter
Difficulty
medium
Time
~25m
Format
Single
Grading
Auto-graded
#frontend#javascript#typescript#classes#pub-sub
Mission file // read carefullymedium
Implement an EventEmitter class with on(event, cb), off(event, cb), and emit(event, ...args). emit calls every subscriber for that event with the provided args. off removes a previously-registered callback.
Build with
TypeScriptJavaScript
Hidden test suite
Auto-graded on submit
Start challenge
Sign in to save your progress.