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9-retry.js

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'use strict';

const DEFAULT_RETRY = 3;

const httpGet = async ({ url, retry = DEFAULT_RETRY }) => {

console.log({ url, retry });

const res = await fetch(url).catch(() => ({ ok: false }));

if (!res.ok) {

const attemptsLeft = retry - 1;

if (attemptsLeft > 0) return httpGet({ url, retry: attemptsLeft });

throw new Error('Can not get data');

}

return res.json();

};

const main = async () => {

try {

const key = '1f43ea96b1e343fe94333dd2b97a109d';

const url = 'https://openexchangerates.org/api/latest.json?app_id=' + key;

const data = await httpGet({ url });

const rate = data.rates['UAH'];

console.log({ rate });

} catch (err) {

console.error({ err });

}

};

main();