npmpackage.info

Gathering detailed insights and metrics for change-emitter

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Gathering detailed insights and metrics for change-emitter

change-emitter - 0.1.6 | npmpackage.info

change-emitter

Listen for changes. Like an event emitter that only emits a single event type. Really tiny.

0.1.6

JavaScript

1.4

Installations

npm install change-emitter

Developer Guide

BETA

Typescript

No

Module System

CommonJS

Node Version

7.9.0

NPM Version

4.2.0 Pull Requests

Open

14

Total

22

Closed

3

Merged

5

Issues

Open

2

Total

4

Closed

2

Releases

Unable to fetch releases

Languages

JavaScript

JavaScript (100%)

Developer

acdlite

Download Statistics

Total Downloads

Last Day

Last Week

Last Month

Last Year

GitHub Statistics

59 Stars

21 Commits

8 Forks

5 Watchers

15 Branches

4 Contributors

Updated on Jun 18, 2025

Maintainers

View All 4 Contributors

Package Meta Information

Latest Version

0.1.6

Package Id

change-emitter@0.1.6

Size

2.59 kB

NPM Version

4.2.0

Node Version

7.9.0

Published on

Apr 17, 2017

Total Downloads

Cumulative downloads

Total Downloads

NaN

Last Day

NaN

Compared to previous day

Last Week

NaN

Compared to previous week

Last Month

NaN

Compared to previous month

Last Year

NaN

Compared to previous year

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dev Dependencies

ava babel-cli babel-core babel-preset-es2015 eslint eslint-config-airbnb-base eslint-plugin-import sinon

change-emitter

Listen for changes. Like an event emitter that only emits a single event type. Really tiny.

I extracted this from Redux's createStore() because I found it to be useful in other contexts. Use it where you want the most minimal event subscription implementation possible.

Usage

1import { createChangeEmitter } from 'change-emitter'
2
3const emitter = createChangeEmitter()
4
5// Called `listen` instead of `subscribe` to avoid confusion with observable spec
6const unlisten = emitter.listen((...args) => {
7  console.log(args)
8})
9
10emitter.emit(1, 2, 3) // logs `[1, 2, 3]`
11unlisten()
12emitter.emit(4, 5, 6) // doesn't log

Larger example

Here's a (partial) implementation of Redux's createStore:

1const createStore = (reducer, initialState) => {
2  let state = initialState
3  const emitter = createChangeEmitter()
4
5  function dispatch(action) {
6    state = reducer(state, action)
7    emitter.emit()
8    return action
9  }
10
11  function getState() {
12    return state
13  }
14
15  return {
16    dispatch,
17    getState,
18    subscribe: emitter.listen
19  }
20}

No vulnerabilities found.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

1

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

0

Maintained

Determines if the project is "actively maintained".

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Security-Policy

Determines if the project has published a security policy.

0

Fuzzing

Determines if the project uses fuzzing.

0

License

Determines if the project has defined a license.

0

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

0

SAST

Determines if the project uses static code analysis.

0

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

Reason

58 existing vulnerabilities detected

Details

Warn: Project is vulnerable to: GHSA-v88g-cgmw-v5xw
Warn: Project is vulnerable to: GHSA-67hx-6x53-jw92
Warn: Project is vulnerable to: GHSA-v6h2-p8h4-qcjw
Warn: Project is vulnerable to: GHSA-cwfw-4gq5-mrqx
Warn: Project is vulnerable to: GHSA-g95f-p29q-9xw4
Warn: Project is vulnerable to: GHSA-grv7-fg5c-xmjg
Warn: Project is vulnerable to: GHSA-3xgq-45jj-v275
Warn: Project is vulnerable to: GHSA-9vvw-cc9w-f27h
Warn: Project is vulnerable to: GHSA-gxpj-cx7g-858c
Warn: Project is vulnerable to: GHSA-hr2v-3952-633q
Warn: Project is vulnerable to: GHSA-ff7x-qrg7-qggm
Warn: Project is vulnerable to: GHSA-4gmj-3p3h-gm8h
Warn: Project is vulnerable to: GHSA-qrmc-fj45-qfc2
Warn: Project is vulnerable to: GHSA-8r6j-v8pm-fqw3
Warn: Project is vulnerable to: MAL-2023-462
Warn: Project is vulnerable to: GHSA-xf7w-r453-m56c
Warn: Project is vulnerable to: GHSA-pfrx-2q88-qq97
Warn: Project is vulnerable to: GHSA-44pw-h2cw-w3vq
Warn: Project is vulnerable to: GHSA-jp4x-w63m-7wgm
Warn: Project is vulnerable to: GHSA-c429-5p7v-vgjp
Warn: Project is vulnerable to: GHSA-43f8-2h32-f4cj
Warn: Project is vulnerable to: GHSA-qqgx-2p2h-9c37
Warn: Project is vulnerable to: GHSA-4hpf-3wq7-5rpr
Warn: Project is vulnerable to: GHSA-f522-ffg8-j8r6
Warn: Project is vulnerable to: GHSA-p9w8-2mpq-49h9
Warn: Project is vulnerable to: GHSA-2pr6-76vf-7546
Warn: Project is vulnerable to: GHSA-8j8c-7jfh-h6hx
Warn: Project is vulnerable to: GHSA-896r-f27r-55mw
Warn: Project is vulnerable to: GHSA-9c47-m6qq-7p4h
Warn: Project is vulnerable to: GHSA-282f-qqgm-c34q
Warn: Project is vulnerable to: GHSA-fvqr-27wr-82fm
Warn: Project is vulnerable to: GHSA-4xc9-xhrj-v574
Warn: Project is vulnerable to: GHSA-x5rq-j2xg-h7qm
Warn: Project is vulnerable to: GHSA-jf85-cpcp-j695
Warn: Project is vulnerable to: GHSA-p6mc-m468-83gw
Warn: Project is vulnerable to: GHSA-29mw-wpgm-hmr9
Warn: Project is vulnerable to: GHSA-35jh-r3h4-6jhm
Warn: Project is vulnerable to: GHSA-952p-6rrq-rcjv
Warn: Project is vulnerable to: GHSA-f8q6-p94x-37v3
Warn: Project is vulnerable to: GHSA-vh95-rmgr-6w4m
Warn: Project is vulnerable to: GHSA-xvch-5gv4-984h
Warn: Project is vulnerable to: GHSA-w9mr-4mfr-499f
Warn: Project is vulnerable to: GHSA-hj48-42vr-x3v9
Warn: Project is vulnerable to: GHSA-hrpp-h998-j3pp
Warn: Project is vulnerable to: GHSA-6g33-f262-xjp4
Warn: Project is vulnerable to: GHSA-p8p7-x288-28g6
Warn: Project is vulnerable to: GHSA-c2qf-rxjj-qqgw
Warn: Project is vulnerable to: GHSA-4rq4-32rv-6wp6
Warn: Project is vulnerable to: GHSA-64g7-mvw6-v9qj
Warn: Project is vulnerable to: GHSA-2m39-62fm-q8r3
Warn: Project is vulnerable to: GHSA-mf6x-7mm4-x2g7
Warn: Project is vulnerable to: GHSA-j44m-qm6p-hp7m
Warn: Project is vulnerable to: GHSA-3jfq-g458-7qm9
Warn: Project is vulnerable to: GHSA-5955-9wpr-37jh
Warn: Project is vulnerable to: GHSA-f5x3-32g6-xq36
Warn: Project is vulnerable to: GHSA-g7q5-pjjr-gqvp
Warn: Project is vulnerable to: GHSA-72xf-g2v4-qvf3
Warn: Project is vulnerable to: GHSA-7p7h-4mm5-852v

Score

1.4

/10

Last Scanned on 2025-07-14

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