What is the best practice for handling race conditions when fetching data?
let currentRequestId = 0;
async function fetchData(query) {
const requestId = ++currentRequestId;
const response = await fetch(`/api/search?q=${query}`);
const data = await response.json();
if (requestId === currentRequestId) {
displayResults(data);
}
}
Race conditions in data fetching can occur when multiple requests are made in quick succession, and responses arrive in a different order than the requests. Best practices include: 1) Tracking request order using identifiers or timestamps, 2) Only processing responses that correspond to the most recent request, 3) Canceling outdated requests using AbortController when possible, 4) Implementing debouncing or throttling for user input-triggered requests. This ensures that only the most relevant data is displayed in the UI.