Subscriptions interview questions
Practice 3 questions on subscriptions. Each runs in a real in-browser editor with Jest tests and a worked, diagram-backed solution.
3 questions
- JavaScriptCoding exercise
createGlobalState
MEDIUMBuild a useState shared by every component that calls it, by subscribing React to a store that lives outside it.
25 minPractice - JavaScriptCoding exercise
createStore + useSelector
MEDIUMBuild a store whose subscribers each re-render only when the slice they selected changes.
25 minPractice - JavaScriptCoding exercise
useContextSelector
MEDIUMSubscribe a component to one slice of a context so a change elsewhere in it does not re-render the whole tree.
25 minPractice