1#@!#!123s

: / usr / share / grafana / public / app / plugins / datasource / azuremonitor / utils /

Filename : useAsyncState.ts

back

import { useEffect, useMemo, useState } from 'react';

export function useAsyncState<T>(asyncFn: () => Promise<T>, setError: Function, dependencies: unknown[]) {
  // Use the lazy initial state functionality of useState to assign a random ID to the API call
  // to track where errors come from. See useLastError.
  const [errorSource] = useState(() => Math.random());
  const [value, setValue] = useState<T>();

  const finalValue = useMemo(() => value ?? [], [value]);

  useEffect(() => {
    asyncFn()
      .then((results) => {
        setValue(results);
        setError(errorSource, undefined);
      })
      .catch((err) => {
        setError(errorSource, err);
      });
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, dependencies);

  return finalValue;
}