Add real-life example

Author: tshemsedinov

JavaScript/9-retry.js

@@ -0,0 +1,28 @@
+'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();