Advanced Data Fetching Patterns in React by Juntao Qiu

Author:Juntao Qiu
Language: eng
Format: epub

In this implementation, the preload function is used to initiate a data fetch using SWR. It doesn’t directly return or use the fetched data but relies on SWR’s caching mechanism.

SWR optimizes data fetching in React with an efficient caching strategy. On the initial data fetch, SWR stores the response in a cache using the fetch URL as the key. For subsequent requests with the same key, SWR first checks this cache. If the cached data is recent (within the deduping interval), it’s used immediately, reducing network requests. Meanwhile, SWR revalidates the data in the background to ensure freshness, updating the cache and UI if new data is fetched. This approach leads to faster load times and a seamless user experience, especially for frequently updated data.

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