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errno

libuv errno details exposed

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What is errno?

The errno npm package provides a convenient way to create, manage, and interact with system-level errors in Node.js applications. It allows developers to easily look up error codes and create custom errors that integrate seamlessly with Node.js's error handling mechanisms.

What are errno's main functionalities?

Creating custom errors

This feature allows developers to create custom errors. The code sample demonstrates how to create a new custom error type called 'MyError' and then instantiate an error of this type.

const create = require('errno').create;
const MyError = create('MyError');
const err = new MyError('An error occurred');

Looking up error codes

This feature enables developers to look up error codes by their common names. The code sample shows how to access the properties of the 'errno.code' object to find information about the 'ENOENT' error code.

const errno = require('errno');
console.log(errno.code.ENOENT);

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Package last updated on 16 Dec 2020

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