loud-rejection

2018-10-12 admin

loud-rejection是什么

什么是loud-rejection,Make unhandled promise rejections fail loudly instead of the default silent fail

loud-rejection使用教程帮助文档

loud-rejection Build Status Coverage Status

Make unhandled promise rejections fail loudly instead of the default silent fail

By default, promises fail silently if you don’t attach a .catch() handler to them.

This tool keeps track of unhandled rejections globally. If any remain unhandled at the end of your process, it logs them to STDERR and exits with code 1.

Use this in top-level things like tests, CLI tools, apps, etc, but not in reusable modules. Not needed in the browser as unhandled rejections are shown in the console.

<g-emoji class=“g-emoji” alias=“warning” fallback-src=“https://assets-cdn.github.com/images/icons/emoji/unicode/26a0.png”>⚠️</g-emoji>   Breaking change in minor version

Since v1.1.0, loud-rejection no longer kills your process in the event of an unhandled rejection. If you want the old behavior, see hard-rejection.

Install

$ npm install loud-rejection

Usage

const loudRejection = require('loud-rejection');
const promiseFn = require('promise-fn');

// Install the `unhandledRejection` listeners
loudRejection();

promiseFn();

Without this module it’s more verbose and you might even miss some that will fail silently:

const promiseFn = require('promise-fn');

function error(err) {
	console.error(err.stack);
	process.exit(1);
}

promiseFn().catch(error);

Register script

Alternatively to the above, you may simply require loud-rejection/register and the unhandledRejection listener will be automagically installed for you.

This is handy for ES2015 imports:

import 'loud-rejection/register';

API

loudRejection([log])

log

Type: Function Default: console.error

Custom logging function to print the rejected promise. Receives the error stack.

Related

  • hard-rejection - Make unhandled promise rejections fail hard right away instead of the default silent fail
  • More…

License

MIT © Sindre Sorhus

本站文章除注明转载外,均为本站原创或编译。欢迎任何形式的转载,但请务必注明出处。

转载请注明:文章转载自 JavaScript中文网 [https://www.javascriptcn.com]

本文地址:https://www.javascriptcn.com/read-42518.html

文章标题:loud-rejection

回到顶部