How do you handle race conditions in Redux?

A race condition happens when multiple async requests are in flight and they resolve out of order — e.g., a user types quickly in a search box, an older request for "re" resolves *after* the newer request for "react", overwriting the correct results with stale ones.

1. createAsyncThunk + request tracking: store the latest requestId and ignore results from stale requests.

         const fetchResults = createAsyncThunk("search/fetch", async (query) => {
           const res = await fetch(`/api/search?q=${query}`);
           return res.json();
         });

         builder.addCase(fetchResults.fulfilled, (state, action) => {
           // Only apply the result if it belongs to the most recent request
           if (action.meta.requestId === state.currentRequestId) {
             state.results = action.payload;
           }
         });
         

1. Abort stale requests using AbortController, which createAsyncThunk supports via thunkAPI.signal — cancel the previous request when a new one starts.
2. Debounce/throttle the trigger (e.g., debounce keystrokes) so fewer overlapping requests are made in the first place.
3. Use RTK Query, which automatically de-duplicates in-flight requests, cancels/ignores stale ones, and keeps the cache consistent without manual bookkeeping.