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`‎JavaScript/9-retry.js‎`

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+28Lines changed: 28 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,28 @@`
	`1`	`+'use strict';`
	`2`	`+`
	`3`	`+const DEFAULT_RETRY = 3;`
	`4`	`+`
	`5`	`+const httpGet = async ({ url, retry = DEFAULT_RETRY }) => {`
	`6`	`+ console.log({ url, retry });`
	`7`	`+ const res = await fetch(url).catch(() => ({ ok: false }));`
	`8`	`+ if (!res.ok) {`
	`9`	`+ const attemptsLeft = retry - 1;`
	`10`	`+ if (attemptsLeft > 0) return httpGet({ url, retry: attemptsLeft });`
	`11`	`+ throw new Error('Can not get data');`
	`12`	`+ }`
	`13`	`+ return res.json();`
	`14`	`+};`
	`15`	`+`
	`16`	`+const main = async () => {`
	`17`	`+ try {`
	`18`	`+ const key = '1f43ea96b1e343fe94333dd2b97a109d';`
	`19`	`+ const url = 'https://openexchangerates.org/api/latest.json?app_id=' + key;`
	`20`	`+ const data = await httpGet({ url });`
	`21`	`+ const rate = data.rates['UAH'];`
	`22`	`+ console.log({ rate });`
	`23`	`+ } catch (err) {`
	`24`	`+ console.error({ err });`
	`25`	`+ }`
	`26`	`+};`
	`27`	`+`
	`28`	`+main();`

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