Simple long polling with async/await.
yarn add await-poll
import { poll } from "await-poll";
// This simulates call of some async function.
let counter = 0;
const fn = () => {
console.log("calling api", counter);
counter++;
return counter;
};
// Condition which, if satisfied, ends the polling.
const fnCondition = result => result < 3;
// And finally the call of the poll function itself. It calls `fn` function 3 times, until counter has value equal to 3,
// with 500 ms delay between each call. It returns result of last call of `fn` function, which in this case is number 3.
const finalResult = await poll(fn, fnCondition, 500);
I've written an article reasoning why and how I wrote the poll function: Polling with async/await.