78 lines
2.0 KiB
Markdown
78 lines
2.0 KiB
Markdown
|
# hard-rejection [](https://travis-ci.org/sindresorhus/hard-rejection)
|
||
|
|
|
||
|
|
> Make unhandled promise rejections fail hard right away instead of the default [silent fail](https://gist.github.com/benjamingr/0237932cee84712951a2)
|
||
|
|
|
||
|
|
Promises fail silently if you don't attach a `.catch()` handler.
|
||
|
|
|
||
|
|
This module exits the process with an error message right away when an unhandled rejection is encountered.<br>
|
||
|
|
**Note: That might not be desirable as unhandled rejections can be [handled at a future point in time](https://nodejs.org/api/process.html#process_event_unhandledrejection), although not common. You've been warned.**
|
||
|
|
|
||
|
|
Intended for top-level long-running processes like servers, **but not in reusable modules.**<br>
|
||
|
|
For command-line apps and tests, see [`loud-rejection`](https://github.com/sindresorhus/loud-rejection).
|
||
|
|
|
||
|
|
|
||
|
|
## Install
|
||
|
|
|
||
|
|
```
|
||
|
|
$ npm install hard-rejection
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
```js
|
||
|
|
const hardRejection = require('hard-rejection');
|
||
|
|
const promiseFunction = require('some-promise-fn');
|
||
|
|
|
||
|
|
// Install the handler
|
||
|
|
hardRejection();
|
||
|
|
|
||
|
|
promiseFunction();
|
||
|
|
```
|
||
|
|
|
||
|
|
Without this module it's more verbose and you might even miss some that will fail silently:
|
||
|
|
|
||
|
|
```js
|
||
|
|
const promiseFunction = require('some-promise-fn');
|
||
|
|
|
||
|
|
function error(error) {
|
||
|
|
console.error(error.stack);
|
||
|
|
process.exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
promiseFunction().catch(error);
|
||
|
|
```
|
||
|
|
|
||
|
|
### Register script
|
||
|
|
|
||
|
|
Alternatively to the above, you may simply require `hard-rejection/register` and the handler will be automagically installed for you.
|
||
|
|
|
||
|
|
This is handy for ES2015 imports:
|
||
|
|
|
||
|
|
```js
|
||
|
|
import 'hard-rejection/register';
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
## API
|
||
|
|
|
||
|
|
### hardRejection([log])
|
||
|
|
|
||
|
|
#### log
|
||
|
|
|
||
|
|
Type: `Function`<br>
|
||
|
|
Default: `console.error`
|
||
|
|
|
||
|
|
Custom logging function to print the rejected promise. Receives the error stack.
|
||
|
|
|
||
|
|
|
||
|
|
## Related
|
||
|
|
|
||
|
|
- [loud-rejection](https://github.com/sindresorhus/loud-rejection) - Make unhandled promise rejections fail loudly instead of the default silent fail
|
||
|
|
- [More…](https://github.com/sindresorhus/promise-fun)
|
||
|
|
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
MIT © [Sindre Sorhus](https://sindresorhus.com)
|