bdsqqq / try Goto Github PK

import { $try } from '@bdsqqq/try'

const promise = () => 
  new Promise((res) => 
    setTimeout(() => res('aha!'), 1000)
  )

const promiseThatRejects = () => 
  new Promise((_, rej) => 
    setTimeout(() => rej(new Error('oh no')), 1000)
  )

const result = await $try(promise())
if (!result.error) console.log(result.data)

const otherResult = await $try(promiseThatRejects())
if (!otherResult.error) console.log(otherResult.data)

const fetched = await $try(fetchItems())
if (fetched.error) return handleError(fetched.error)

const transformed = await $try(transform(fetched.data))
if (transformed.error) return handleError(transformed.error)

const [fetched, fetchedError] = await $try(fetchItems())
if (fetchedError) return handleError(fetchedError)

const [transformed, transformedError] = await $try(transform(fetched.data))
if (transformedError) return handleError(transformedError)

const fetchData = () => Promise.resolve({id: 1})
const [data, error] = await trytm(fetchData())
if (error) {
  return
}

data.id // data is possibly null 

declare const trytm: <T>(
   promise: Promise<T>,
) => Promise<readonly [Awaited<T>, null] | readonly [null, unknown]>;

export { trytm };

const [data, error] = await trytm(myPromise())