safe-func-safe-prom

This module quickly turned into tri-fp which is the active library for this functionality. You can:

import { tri as safe, triP as safeP } from "tri-fp";

...if you like the names in this module.

• Make both functions and promises more functional by removing the need for try-catch.
• Handle application errors and native exceptions differently.

Wrap a function in safe, or a promise in safeP, to transform all outcomes except native exceptions into an error-first pair. Don't use try-catch or .catch.

import { safe, safeP } from "safe-func-safe-prom";

// Sync
const [error, result] = safe(myFunction)(arg1, arg2);

// Async, direct promise
const [error, result] = await safeP(myPromise);

// Async, promise returning function
const [error, result] = await safeP(myPromiseReturningFunc)(arg1, arg2);

// Native errors/exceptions will still throw. Don't catch these; Find your bug.

Motivation

• https://dev.to/craigmichaelmartin/the-problem-with-promises-in-javascript-5h46
• https://medium.com/better-programming/js-reliable-fdea261012ee
• https://medium.com/@gunar/async-control-flow-without-exceptions-nor-monads-b19af2acc553

Inspired by / Thanks to

• fAwait
• saferr