retry

• retry
• RetryOptions

Accepts a function func that returns a Promise and a maxRetries parameter (defaulting to 3), returning a function that retries the invocation of the given function upon failure.

The optional parameter options sets up the retry configuration, details of which can be found here.

Added in v0.0.1

Usage

import { retry } from 'parsnip-kit'

let times = 0
const func = async (a: number, b: number) => {
  if (times < 3) {
    times++
    throw new Error(`Error ${times}`)
  }
  return a + b
}
const retried = retry(func)
retried(2, 3).then(res => {
  console.log(res)
  // { status: 'fulfilled', value: 5 }
})

API

Type Parameter

Arg	Type	Description
T		Type of the value returned by the Promise of function func

[[[template poll ja T：関数funcが返すPromiseのvalueの型 ]]]

Arguments

Arg	Type	Optional	Default	Description
func	(...args: any[]) => Promise<T>	false	undefined	The asynchronous task function to be retried must return a Promise
maxRetries	number	true	3	Maximum number of retries
options	RetryOptions<T>	true	undefined	Configuration options
options.delay	number	true	300	Initial delay for retries (in milliseconds)
options.delayFactor	number	true	2	Delay increment factor (the delay is multiplied by this value for each retry)
options.shouldRetry	(error: any, attempts: number) => boolean	true	undefined	Callback function to determine whether to retry
options.onSuccess	(result: T, attempts: number) => any	true	undefined	Callback function when the task is successful
options.onFailure	(result: any, attempts: number) => any	true	undefined	Callback function when the task fails

Returns

Type
(...args: Parameters<typeof func>) => Promise<PromiseSettledResult<Awaited<T>>>

RetryOptions

The options parameter of the retry function.

Added in v0.0.1

Source

export interface RetryOptions<T> {
  delay?: number
  delayFactor?: number
  shouldRetry?: (error: any, attempts: number) => boolean
  onSuccess?: (result: T, attempts: number) => void
  onFailure?: (error: any, attempts: number) => void
}