This part felt straightforward at first but I spent way too long deciding where to put the filter state.
Start by clarifying the requirements: are the filters single-select or multi-select, and should they combine with AND/OR logic? Then describe a state management approach that separates filter options (from API) from selected filter values (UI state), and explain how to trigger data refetches when selections change.
Pro tip: Mention that you'd debounce or batch filter changes to avoid unnecessary API calls, and consider using URL query parameters to make filter state shareable and bookmarkable—this shows you think about user experience and performance beyond the basic implementation.
Ask whether filters are single or multi-select, how they combine (AND/OR), and what the API response looks like for filter options and filtered results.
Separate filter options (fetched once) from selected filter values (local UI state). Use a state management solution like React's useState/useReducer or a store like Redux/Zustand.
Fetch filter options from the API on mount, handle loading/error states, and render three filter buttons dynamically based on the response.
On button click, update selected filter state and trigger a refetch of the list data with the new filter parameters, using debouncing or batching to optimize.
Optionally sync filter state to URL query params for shareability, and handle edge cases like empty results, API errors, and clearing filters.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.
The AND/OR decision was the interesting bit.
Start by clarifying the use case and user expectations, then propose a hybrid approach that defaults to OR for discovery but allows AND for refinement. Justify the choice by weighing user intent, performance, and scalability, and outline how you'd implement it with a clean API.
Pro tip: Mention that you'd make the semantics configurable via a prop or query parameter, and discuss how you'd handle edge cases like empty selections or conflicting tags. This shows you think about real-world flexibility and robustness.
Ask questions to understand the context: Is this for filtering search results, browsing categories, or refining a list? What are the expected user behaviors and data volumes?
Compare AND vs OR semantics: AND gives precise results but may return too few items; OR gives broad results but may include irrelevant items. Consider user intent (exploration vs. specific search) and performance implications.
Recommend a default (e.g., OR for discovery, AND for refinement) and justify it. Suggest making it configurable to adapt to different scenarios.
Describe the API design (e.g., a component prop or query param), data flow, and how you'd handle state management and performance optimizations like memoization or server-side filtering.
Address scenarios like no tags selected, conflicting tags, and how to communicate results to users (e.g., showing counts or empty states).
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.
Start by clarifying requirements (e.g., number of items to show initially, whether the list is static or dynamic) and then outline a clean component structure with a parent managing state and a child rendering the list. Focus on accessibility by using a button with aria-expanded and aria-controls, and ensure the toggle is keyboard operable and screen-reader friendly.
Pro tip: Mention that you would use a <button> element for the toggle to get native keyboard and screen reader support, and consider using CSS to hide/show items rather than removing them from the DOM to maintain focus and state.
Ask about the expected number of items, whether the list is static or fetched, and if there are any design specs for the toggle. This shows you think before coding.
Propose a parent component that holds the expanded state and a child list component that receives items and expanded as props. Keep the toggle button as a separate reusable component if needed.
Use useState (or equivalent) to track expanded/collapsed. Derive the visible items by slicing the array based on the expanded state and a configurable limit.
Use a <button> with aria-expanded and aria-controls pointing to the list ID. Ensure the button text clearly indicates action (e.g., 'See more' vs 'See less') and that focus remains on the button after toggle.
Discuss handling empty lists, dynamic updates, and potential performance issues with large lists (e.g., virtualization). Mention that toggling should not cause layout shifts that disorient users.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.