Package description
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.
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();Similar to `bail`, `throw-if-error` provides a mechanism to throw errors if they exist. It simplifies error handling by throwing errors immediately when they are encountered, similar to how `bail` operates. The main difference is in the API and usage patterns, but both aim to simplify error handling in Node.js applications.
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
Throw if given an error.
This package throws a given error.
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.
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>
import {bail} from 'bail'
bail()
bail(new Error('failure'))
// Error: failure
// at repl:1:6
// at REPLServer.defaultEval (repl.js:154:27)
// …
This package exports the following identifier: bail.
There is no default export.
bail(err?)Throw a given error (Error?).
This package is fully typed with TypeScript. There are no extra exported types.
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.
This package is safe.
Yes please! See How to Contribute to Open Source.
FAQs
Throw a given error
The npm package bail receives a total of 7,981,668 weekly downloads. As such, bail popularity was classified as popular.
We found that bail demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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