69 lines
1.7 KiB
Markdown
69 lines
1.7 KiB
Markdown
|
# loud-rejection [](https://travis-ci.org/sindresorhus/loud-rejection) [](https://coveralls.io/github/sindresorhus/loud-rejection?branch=master)
|
||
|
|
|
||
|
|
> Make unhandled promise rejections fail loudly instead of the default [silent fail](https://gist.github.com/benjamingr/0237932cee84712951a2)
|
||
|
|
|
||
|
|
By default, promises fail silently if you don't attach a `.catch()` handler to them.
|
||
|
|
|
||
|
|
Use this in top-level things like tests, CLI tools, apps, etc, **but not in reusable modules.**<br>
|
||
|
|
Not needed in the browser as unhandled promises are shown in the console.
|
||
|
|
|
||
|
|
|
||
|
|
## Install
|
||
|
|
|
||
|
|
```
|
||
|
|
$ npm install --save loud-rejection
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
```js
|
||
|
|
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:
|
||
|
|
|
||
|
|
```js
|
||
|
|
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:
|
||
|
|
|
||
|
|
```js
|
||
|
|
import 'loud-rejection/register';
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
## API
|
||
|
|
|
||
|
|
### loudRejection([log])
|
||
|
|
|
||
|
|
#### log
|
||
|
|
|
||
|
|
Type: `Function`<br>
|
||
|
|
Default: `console.error`
|
||
|
|
|
||
|
|
Custom logging function to print the rejected promise. Receives the error stack.
|
||
|
|
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
MIT © [Sindre Sorhus](https://sindresorhus.com)
|