flatasync

flatAsync

flatAsync a simple wrapper to use Async/Await calls without try/catch blocks. Flat style pattern to handle errors.

Install

npm i flatasync --save

Use

ES6/7

import flatAsync from 'flatasync'

NodeJs

const flatAsync = require('flatasync');

Example

import flatAsync from 'flatasync';

const [err, response] = await flatAsync(AsyncCall(...));

if (err) return console.error(err);
if (!response) return console.console('Not Found');

// use response here

Before

You must use try/catch in Javascript's await calls to handle errors from promise.

try {
  const user = await ajaxAPICall('/users/1');
  if(!user) return cb(null, 'User not found');
} catch(e) {
  return cb(e, 'Unexpected error occurred');
}
// another call based on user's data
try {
  const post = await ajaxAPICall(`/posts/${user.postId}`);
  if(!post) return cb(null, 'Post not found for user ${user.name}');
  else return return cb(null, post);
} catch(e) {
  return cb(e, 'Unexpected error occurred');
}

After

flatAsync wraps your await Promise or Method and returns errors/results in array [err, results].

import flatAsync from 'flatasync';
...

let user, post, err;

[err, user] = await flatAsync(AjaxCall('/user/1'));
if(err || !user) return cb(err, 'User not found');

[err, post] = await flatAsync(AjaxCall(`/posts/${user.postId}`));
if(err || !post) return cb(err, 'Post not found');

return cb(null, post);