Managing numerous API requests in React Native

As I work on implementing a search field, I've encountered a challenge. Whenever a user enters text in the search field, a timer resets to 300 ms before an API call is sent to fetch autocomplete results. After receiving these results, the app then waits for another second before sending another request. However, during this time, the user may enter more text. One issue that arises is when the search API is called and, before the response arrives, the user changes the text, triggering another pre-search call. When the response for the initial search arrives, it is mistaken for the pre-search response, leading to errors. Is there any way to address this issue?

Answer №1

One solution is to stop the in-flight request when more text is entered by the user.

If you're using the fetch api, cancelling the request can be tricky as it doesn't have a built-in cancellation feature following the Promise specification. Instead, consider using XMLHttpRequest directly for easier request cancellation.

Alternatively, you can check within the fetch response handler if the original search text has changed; if so, simply avoid any action in that handler.

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