isRetryableHttpError

isRetryableHttpError(err): boolean

Determines whether an HTTP error (or generic error) should be retried.

• Never retry on:
  • 2xx (success) responses
  • 3xx (redirect) responses
• Retry on:
  • 408 (Request Timeout)
  • 429 (Too Many Requests)
  • Any 5xx (server error) responses
  • Anyhing without a numeric status property

Parameters

err

unknown

The error to inspect. May be an Error with an optional numeric status field.

Returns

boolean

true if the error is retryable, otherwise false.

Example

// Retry on 500 server error
isRetryableHttpError({ status: 500 })    // → true

// Do not retry on 404 Not Found
isRetryableHttpError({ status: 404 })    // → false

// Retry on network or other non-HTTP errors
isRetryableHttpError(new Error('network')) // → true