doublet

Handle any Javascript and Typescript function as an error and response tuple. This prevents declaring variables outside of a try/catch block for a cleaner flow.

Forked from mats852/doublet to return an object instead of an array.

Installation

npm i @billyjacoby/doublet

Usage

Traditionnal error handling

import doublet from 'doublet';
import HttpException from 'your-favorite-error-handler';

async function fetchUser(id: string): User {
  let user;

  try {
    user = await fetch(`/users/${id}`).then(res => res.json());
  } catch (error) {
    throw new HttpException(`Could not fetch user ID "${id}", Error; ${error.message}`, error.status);
  }

  // Do something with user
}

With doublet

import axios from 'axios';
import doublet from 'doublet';
import HttpException from 'your-favorite-error-handler';

async function fetchUser(id: string): User {
  const {data: user, error: userError} = await doublet(axios, `/users/${id}`);
  if (userError) throw new HttpException(`Could not fetch user ID "${id}", Error; ${userError.message}`, userError.status);

  // Do something with user
}