Fetch with retry in JavaScript

Retries a failed request with a growing delay, because networks fail for a moment and then do not.

async function fetchRetry(url, attempts = 3) {
  for (let i = 0; i < attempts; i++) {
    try {
      const res = await fetch(url);
      if (res.ok) return res.json();
      throw new Error(`HTTP ${res.status}`);
    } catch (err) {
      if (i === attempts - 1) throw err;
    }
  }
}

Keywords and builtins used here

• async
• await
• catch
• const
• for
• function
• if
• let
• return
• throw
• try

The run, in numbers

Lines

11

Characters to type

246

Tokens

84

Three-star pace

110 tpm

At the three-star pace of 110 tokens a minute, this run takes about 46 seconds.

Type this snippet

Step 4 of 4 in Canceling & limiting, step 18 of 19 in Promises & async.

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