Type Alias RetryMiddleware

Retry middleware

Retries a request multiple times in case of an error (or until a custom condition is true).

💡 By default, the request will be retried only for server errors (5xx) and other non-successful responses, but not for client errors (4xx).

// To retry on all non-2xx responses (including 4xx):
until: (response, error) => response && response.ok
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import wretch from 'wretch'
import { retry } from 'wretch/middlewares'

wretch().middlewares([
  retry({
    // Options - defaults below
    delayTimer: 500,
    delayRamp: (delay, nbOfAttempts) => delay * nbOfAttempts,
    maxAttempts: 10,
    until: (response, error) => response && (response.ok || (response.status >= 400 && response.status < 500)),
    onRetry: null,
    retryOnNetworkError: false,
    resolveWithLatestResponse: false,
    skip: undefined
  })
])

// You can also return a Promise, which is useful if you want to inspect the body:
wretch().middlewares([
  retry({
    until: response =>
      response.clone().json().then(body =>
        body.field === 'something'
      )
  })
])
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