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+# hard-rejection [![Build Status](https://travis-ci.org/sindresorhus/hard-rejection.svg?branch=master)](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)