Function: delayReject()

delayReject<T>(duration, reason?): IPromisE_Delay<T>

Defined in: packages/promise/src/delayReject.ts:40

Function

PromisE.delayReject

Type Parameters

T

T = never

Parameters

duration

number

reason?

unknown

Returns

IPromisE_Delay<T>

Examples

Create a promise that will rejectafter 3 seconds

import PromisE from '@superutils/promise'

const rejectPromise = PromisE.delayReject(
    3000, // duration in milliseconds
    new Error('App did not initialization on time'), // reason to reject with
)
await rejectPromise // throws error message after 3 seconds
codeThatWillNotExecute()

Prevent automated promise rejection by forcing it to resolve before timeout

import PromisE from '@superutils/promise'

const rejectPromise = PromisE.delayReject(
    3000,
    new Error('App did not initialization on time'),
)
let count = 0
const appReady = () => ++count >= 2 // return true on second call
const intervalId = setInterval(() => {
    if (!appReady()) return
    rejectPromise.resolve('force resolves rejectPromise and execution continues')
    clearInterval(intervalId)
}, 100)
await rejectPromise
console.log('App is now ready')