Implementing Exponential Backoff for Query Retries

Showcase an implementation of exponential backoff in React Query's retry logic to progressively increase the delay between consecutive retries, minimizing server load.

const exponentialBackoff = attemptIndex => Math.min(1000 * 2 ** attemptIndex, 30000);

Defines an exponential backoff function. This function calculates the delay before the next retry attempt. The delay doubles with each attempt, starting at 1 second (1000 milliseconds), up to a maximum of 30 seconds.

const queryOptions = {
  retry: 3, // Number of retry attempts
  retryDelay: exponentialBackoff, // Use the exponentialBackoff function for calculating delay
};

Sets up query options including the number of retries and the delay between retries using the exponentialBackoff function.

useQuery(['dataKey'], fetchDataFunction, queryOptions);

Uses the useQuery hook from React Query to fetch data. The 'dataKey' is a unique identifier for the query, 'fetchDataFunction' is the function to fetch your data, and 'queryOptions' includes our custom retry strategy.