Files
frontend-app-account/src/hooks.js
michaelroytman 9e967ba1ea perf: Fix Flickering By Removing Unnecessary Re-Renders
The use of useState and useEffect hooks in the IDVerificationContextProvider and VerificationContextProvider that were unnecessary was triggering many extra re-renders and inappropriate renders, causing a UI flicker across multiple re-renders.
2021-10-06 16:28:09 -04:00

32 lines
927 B
JavaScript

import { useEffect, useState } from 'react';
import {
IDLE_STATUS, LOADING_STATUS, SUCCESS_STATUS, FAILURE_STATUS,
} from './constants';
// eslint-disable-next-line import/prefer-default-export
export function useAsyncCall(asyncFunc) {
// React doesn't batch setStates call in async useEffect hooks,
// so we use a combined object here to ensure that users
// re-render once.
const [data, setData] = useState({ status: IDLE_STATUS });
useEffect(
() => {
(async () => {
setData(currData => ({ ...currData, status: LOADING_STATUS }));
const response = await asyncFunc();
if (Object.keys(response).length === 0) {
setData(currData => ({ ...currData, status: FAILURE_STATUS, data: response }));
} else {
setData(currData => ({ ...currData, status: SUCCESS_STATUS, data: response }));
}
})();
},
[asyncFunc],
);
return data;
}