How to Build an ETF Screener in React
Build a responsive React ETF screener with search, return filters, pagination, loading states, and a server-side ETF API.
Choose filters users can understand
Begin with symbol search, one-year return, dividend yield, volatility, asset class, and sort order. A small number of clear filters is more useful than a large form whose metrics are not explained.
Keep filter state in React, but execute screening in the API. Sending the complete dataset to the browser increases load time and makes pagination and plan limits harder to enforce.
Build the data-fetching flow
Debounce text search, reset the offset when any filter changes, and cancel stale requests. Represent loading, empty, error, and success states explicitly. The server response should contain data, total, limit, and offset so the UI can render accurate pagination.
- Debounce search by roughly 250–400 milliseconds
- Store query parameters in the URL for shareable screens
- Use accessible labels and keyboard-friendly controls
- Show the metric date next to results
Make screening fast
Pre-compute expensive returns and volatility after market data updates. Data Captain stores these values in an ETF metrics table so the screener filters one row per fund rather than recalculating years of history for every request.
Ready to build with Data Captain?
Read the API docs