JSPM

TryResult

📛 A typescript library to get rid of try catches, and replace them with result types, inspired by Rust and Go error handling.

Install

As with any npm package:

npm i tryresult

Usage

Import from the package:

import { tryAsync, isError } from "tryresult";

Wrap your async function with tryAsync:

let users = await tryAsync(
    // get a list of users from the database
    db.user.findMany()
);

This will make the users variable be of type T | Error, meaning it can be either a value or an error (a union of types).

Then check for error in the variable with isError, and then handle the error:

if (isError(users)) {
    return "Could not get users from db";
}

This is a type guard and all code after the isError will consider result's type to be T.

To see the library used in a project, checkout out ahmeddots/oswald.