bail

What is bail?

The `bail` npm package is designed to provide a simple way to handle errors in asynchronous and synchronous code. It allows developers to quickly exit a function or process when an error is encountered, simplifying error handling and control flow in Node.js applications.

What are bail's main functionalities?

Error handling in asynchronous functions

This feature demonstrates how `bail` can be used in asynchronous functions to handle errors. If an error occurs during the `someAsyncOperation` call, `bail` is called with the error, effectively throwing the error and allowing it to be caught by higher-level error handlers or causing the process to exit if uncaught.

const bail = require('bail');

async function fetchData() {
  try {
    const data = await someAsyncOperation();
    return data;
  } catch (err) {
    bail(err);
  }
}

fetchData();

Error handling in synchronous functions

This feature shows how `bail` can be used in synchronous functions to handle errors. If an error occurs while reading or parsing the config file, `bail` is invoked with the error, which then either gets caught by a higher-level error handler or causes the process to exit if it remains uncaught.

const bail = require('bail');

function readConfigFile() {
  try {
    const config = fs.readFileSync('/path/to/config.json', 'utf8');
    return JSON.parse(config);
  } catch (err) {
    bail(err);
  }
}

readConfigFile();

Other packages similar to bail

ensure-error

While `ensure-error` is focused on ensuring that values are instances of Error, it shares the goal of simplifying error handling in JavaScript applications with `bail`. `ensure-error` can be used in conjunction with error handling mechanisms to ensure that all errors passed through the application's flow are properly instances of Error, complementing `bail`'s straightforward error throwing approach.

README

bail

:warning: Throw a given error.

Install

npm:

npm install bail

Use

var bail = require('bail')

bail()

bail(new Error('failure'))
// Error: failure
//     at repl:1:6
//     at REPLServer.defaultEval (repl.js:154:27)
//     …

API

bail([err])

Throw a given error.

Parameters

• err (Error?) — Optional error.

Throws

• Error — Given error, if any.

Related

• noop
• noop2
• noop3

License

MIT © Titus Wormer