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# safe-event-emitter

An `EventEmitter` that isolates the emitter from errors in handlers. If an error is thrown in a handler it is caught and re-thrown inside of a `setTimeout` so as to not interrupt the emitter's code flow.

The API is the same as a core [`EventEmitter`](https://nodejs.org/api/events.html).

### Install

```bash
$ yarn add '@metamask/safe-event-emitter'
```

### Usage

```js
import SafeEventEmitter from '@metamask/safe-event-emitter';

const ee = new SafeEventEmitter();
ee.on('boom', () => { throw new Error(); });
ee.emit('boom'); // No error here

// Error is thrown after setTimeout
```

### Release & Publishing

The project follows the same release process as the other libraries in the MetaMask organization:

1. Create a release branch
    - For a typical release, this would be based on `master`
    - To update an older maintained major version, base the release branch on the major version branch (e.g. `1.x`)
2. Update the changelog
3. Update version in package.json file (e.g. `yarn version --minor --no-git-tag-version`)
4. Create a pull request targeting the base branch (e.g. master or 1.x)
5. Code review and QA
6. Once approved, the PR is squashed & merged
7. The commit on the base branch is tagged
8. The tag can be published as needed

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