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

Throw if given an error.

Contents

• What is this?
• When should I use this?
• Install
• Use
• API
  • bail(err?)
• Types
• Compatibility
• Security
• Related
• Contribute
• License

What is this?

This package throws a given error.

When should I use this?

Use this package if you’re building some scripts that might theoretically get errors but frequently don’t and you keep writing if (error) throw error over and over again and you’re just really done with that.

Install

This package is ESM only. In Node.js (version 12.20+, 14.14+, or 16.0+), install with npm:

npm install bail

In Deno with Skypack:

import {bail} from 'https://cdn.skypack.dev/bail@2?dts'

In browsers with Skypack:

<script type="module">
  import {bail} from 'https://cdn.skypack.dev/bail@2?min'
</script>

Use

import {bail} from 'bail'

bail()

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

API

This package exports the following identifier: bail. There is no default export.

bail(err?)

Throw a given error (Error?).

Types

This package is fully typed with TypeScript. There are no extra exported types.

Compatibility

This package is at least compatible with all maintained versions of Node.js. As of now, that is Node.js 12.20+, 14.14+, and 16.0+. It also works in Deno and modern browsers.

Security

This package is safe.

Related

• noop
• noop2
• noop3

Contribute

Yes please! See How to Contribute to Open Source.

License

MIT © Titus Wormer