Gathering detailed insights and metrics for component-emitter
Gathering detailed insights and metrics for component-emitter
Installations
npm install component-emitterDeveloper Guide
BETA
Typescript
Yes
Module System
CommonJS, ESM
Min. Node Version
>=18
Node Version
20.9.0
NPM Version
9.2.0
Languages
1
JavaScript
JavaScript (100%)
Developer
sindresorhus
Download Statistics
Total Downloads
0
Last Day
0
Last Week
0
Last Month
0
Last Year
0
GitHub Statistics
MIT License
601 Stars
94 Commits
118 Forks
16 Watchers
3 Branches
22 Contributors
Updated on May 25, 2025
Sponsor this package
Maintainers
33
Package Meta Information
Latest Version
2.0.0
Package Id
component-emitter@2.0.0
Unpacked Size
9.34 kB
Size
2.93 kB
File Count
5
NPM Version
9.2.0
Node Version
20.9.0
Published on
Nov 17, 2023
Total Downloads
Cumulative downloads
Total Downloads
NaN
Last Day
0%
NaN
Compared to previous day
Last Week
0%
NaN
Compared to previous week
Last Month
0%
NaN
Compared to previous month
Last Year
0%
NaN
Compared to previous year
Weekly Downloads
Monthly Downloads
Yearly Downloads
component-emitter
Simple event emitter
Install
1npm install component-emitter
Usage
As an Emitter instance:
1import Emitter from 'component-emitter'; 2 3const emitter = new Emitter(); 4 5emitter.emit('🦄');
As a mixin:
1import Emitter from 'component-emitter'; 2 3const user = {name: 'tobi'}; 4Emitter(user); 5 6user.emit('I am a user');
As a prototype mixin:
1import Emitter from 'component-emitter'; 2 3Emitter(User.prototype);
API
new Emitter()
Create a new emitter.
Emitter(object)
Use it as a mixin. For example a plain object may become an emitter, or you may extend an existing prototype.
Emitter#on(event, listener)
Register an event handler that listens to a specified event.
Emitter#once(event, listener)
Register a one-time event handler for a specified event.
Emitter#off(event, listener)
Remove a specific event handler for a specified event.
Emitter#off(event)
Remove all event handlers for a specified event.
Emitter#off()
Remove all event handlers for all events.
Emitter#emit(event, ...arguments)
Emit an event, invoking all handlers registered for it.
Emitter#listeners(event)
Retrieve the event handlers registered for a specific event.
Emitter#listenerCount(event)
Get the count of listeners for a specific event.
Emitter#listenerCount()
Get the count of all event handlers in total.
Emitter#hasListeners(event)
Check if there are any handlers registered for a specific event.
Emitter#hasListeners()
Check if there are any handlers registered for any event.
FAQ
How does it differ from the Node.js EventEmitter?
It's simpler and more lightweight, and it works in any JavaScript environment, not just Node.js. It also provides mixin functionality to add event handling to existing objects without needing inheritance.
No vulnerabilities found.
Reason
no dangerous workflow patterns detected
Reason
no binaries found in the repo
Reason
security policy file detected
Details
- Info: security policy file detected: .github/security.md:1
- Info: Found linked content: .github/security.md:1
- Info: Found disclosure, vulnerability, and/or timelines in security policy: .github/security.md:1
- Info: Found text in security policy: .github/security.md:1
Reason
0 existing vulnerabilities detected
Reason
license file detected
Details
- Info: project has a license file: LICENSE:0
- Info: FSF or OSI recognized license: MIT License: LICENSE:0
Reason
Found 5/28 approved changesets -- score normalized to 1
Reason
0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
Reason
detected GitHub workflow tokens with excessive permissions
Details
- Warn: no topLevel permission defined: .github/workflows/main.yml:1
- Info: no jobLevel write permissions found
Reason
dependency not pinned by hash detected -- score normalized to 0
Details
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:16: update your workflow using https://app.stepsecurity.io/secureworkflow/sindresorhus/component-emitter/main.yml/main?enable=pin
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:17: update your workflow using https://app.stepsecurity.io/secureworkflow/sindresorhus/component-emitter/main.yml/main?enable=pin
- Warn: npmCommand not pinned by hash: .github/workflows/main.yml:21
- Info: 0 out of 2 GitHub-owned GitHubAction dependencies pinned
- Info: 0 out of 1 npmCommand dependencies pinned
Reason
no effort to earn an OpenSSF best practices badge detected
Reason
project is not fuzzed
Details
- Warn: no fuzzer integrations found
Reason
branch protection not enabled on development/release branches
Details
- Warn: branch protection not enabled for branch 'main'
Reason
SAST tool is not run on all commits -- score normalized to 0
Details
- Warn: 0 commits out of 7 are checked with a SAST tool
Score
4.2
/10
Last Scanned on 2025-07-07
The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.
Learn More