Consider a Remix component that uses a search input to filter a list of items. Which option correctly describes how the search input updates the displayed results?
export default function Search() {
const [query, setQuery] = React.useState('');
const items = ['apple', 'banana', 'cherry', 'date'];
const filtered = items.filter(item => item.includes(query));
return (
<main>
<input
aria-label="Search items"
value={query}
onChange={e => setQuery(e.target.value)}
/>
<ul>
{filtered.map(item => <li key={item}>{item}</li>)}
</ul>
</main>
);
}Think about how React state controls what is shown on the screen.
In Remix React components, updating state with setState triggers a re-render. The filtered list depends on the query state, so changing the input updates the displayed items immediately.
In Remix, you can use a loader function to fetch search results from the server. When does this loader run in relation to user search input?
export async function loader({ request }) { const url = new URL(request.url); const search = url.searchParams.get('q') || ''; const results = await fetchData(search); return json({ results }); }
Remember that Remix loaders run on server requests and URL changes.
Remix loaders run on initial page load and whenever the URL changes. If the search query is in the URL, changing it triggers the loader to fetch new results.
Which code snippet correctly extracts the 'q' search parameter from the request URL in a Remix loader?
Look at how to create a URL object from the request URL string.
In Remix loaders, the request object has a URL string. You create a URL object from it, then use searchParams.get to read query parameters.
Given this loader code, why might the search results always be empty?
export async function loader({ request }) {
const url = new URL(request.url);
const search = url.searchParams.get('query');
const results = await fetchData(search);
return json({ results });
}Check if the parameter name matches what the URL uses.
If the URL uses 'q' but the code reads 'query', search will be null, causing fetchData to return empty results.
In Remix, when implementing search functionality that fetches data server-side, how is the search state synchronized between client input and server loader?
Think about how Remix uses URLs to share state between client and server.
Remix uses the URL as the single source of truth for state shared between client and server. Changing the URL query triggers the loader to fetch data, keeping client and server in sync.