tryAsyncCall

Wraps an async function call in a try-catch and returns a Promise<[error, result]> tuple instead of throwing. For sync functions, use tryCall.

Usage

import { tryAsyncCall } from 'rattail'

const [err, result] = await tryAsyncCall(() => fetch('/api'))
// [undefined, Response]

const [err2, result2] = await tryAsyncCall(async () => {
  throw new Error('fail')
})
// [Error, undefined]

// Pass arguments directly
const [err3, result3] = await tryAsyncCall(fetch, '/api')
// [undefined, Response]

const asyncAdd = async (a: number, b: number) => a + b
const [err4, result4] = await tryAsyncCall(asyncAdd, 1, 2)
// [undefined, 3]

Arguments

Arg	Type	Description
fn	(...args: Args) => Promise<T>	An async function to call
...args	Args	Arguments to pass to fn

Return

Type
Promise<[unknown, undefined] | [undefined, T]>