npmpackage.info

Gathering detailed insights and metrics for @fluentui/react-context-selector

@fluentui/react-context-selector - 9.2.2 | npmpackage.info

@fluentui/react-context-selector

Fluent UI web represents a collection of utilities, React components, and web components for building web applications.

9.2.2

19,397

NOASSERTION

TypeScript

107.57 kB

6.4

Installations

npm install @fluentui/react-context-selector

Developer Guide

BETA

Typescript

No

Module System

CommonJS, ESM

Node Version

20.19.0

NPM Version

10.8.2 Pull Requests

Open

196

Total

20,216

Closed

2,909

Merged

17,111

Issues

Open

468

Total

13,346

Closed

12,878

Releases

19,643

@fluentui/react-monaco-editor v1.7.348

@fluentui/react-monaco-editor_v1.7.348

Updated on Jul 11, 2025

@fluentui/react-docsite-components v8.13.230

@fluentui/react-docsite-components_v8.13.230

Updated on Jul 11, 2025

@fluentui/react-charting v5.24.12

@fluentui/react-charting_v5.24.12

Updated on Jul 11, 2025

@fluentui/chart-utilities v1.1.21

@fluentui/chart-utilities_v1.1.21

Updated on Jul 11, 2025

@fluentui/codemods v8.4.28

@fluentui/codemods_v8.4.28

Updated on Jul 10, 2025

@fluentui/react-tooltip v9.7.6

@fluentui/react-tooltip_v9.7.6

Updated on Jul 07, 2025

View All 19,643 releases

Languages

TypeScript

JavaScript

MDX

SCSS

HTML

CSS

Shell

Handlebars

Dockerfile

TypeScript (95%)

JavaScript (2.07%)

MDX (1.96%)

SCSS (0.59%)

HTML (0.21%)

CSS (0.17%)

Shell (0.01%)

Developer

microsoft

Download Statistics

Total Downloads

Last Day

Last Week

Last Month

Last Year

GitHub Statistics

NOASSERTION License

19,397 Stars

19,659 Commits

2,813 Forks

286 Watchers

108 Branches

908 Contributors

Updated on Jul 12, 2025

Maintainers

View All 908 Contributors

Package Meta Information

Latest Version

9.2.2

Package Id

@fluentui/react-context-selector@9.2.2

Unpacked Size

107.57 kB

Size

16.34 kB

File Count

NPM Version

10.8.2

Node Version

20.19.0

Published on

Jun 26, 2025

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

`@fluentui/react-context-selector`

React useContextSelector() hook in userland.

Introduction

React Context and useContext() is often used to avoid prop drilling, however it's known that there's a performance issue. When a context value is changed, all components that are subscribed with useContext() will re-render.

useContextSelector is recently proposed. While waiting for the process, this library provides the API in userland.

Installation

NPM

1npm install --save @fluentui/react-context-selector

Yarn

1yarn add @fluentui/react-context-selector

Usage

Getting started

1import * as React from 'react';
2import { createContext, useContextSelector, ContextSelector } from '@fluentui/react-context-selector';
3
4interface CounterContextValue {
5  count1: number;
6  count2: number;
7  incrementCount1: () => void;
8  incrementCount2: () => void;
9}
10
11// 💡 The same syntax as native React context API
12//    https://reactjs.org/docs/context.html#reactcreatecontext
13const CounterContext = createContext<CounterContextValue>({} as CounterContextValue);
14
15const CounterProvider = CounterContext.Provider;
16
17// not necessary but can be a good layer to mock for unit testing
18const useCounterContext = <T,>(selector: ContextSelector<CounterContextValue, T>) =>
19  useContextSelector(CounterContext, selector);
20
21const Counter1 = () => {
22  // 💡 Context updates will be propagated only when result of a selector function will change
23  //    "Object.is()" is used for internal comparisons
24  const count1 = useCounterContext(context => context.count1);
25  const increment = useCounterContext(context => context.incrementCount1);
26
27  return <button onClick={increment}>Counter 1: {count1}</button>;
28};
29
30const Counter2 = () => {
31  const count2 = useCounterContext(context => context.count2);
32  const increment = useCounterContext(context => context.incrementCount2);
33
34  return <button onClick={increment}>Counter 2: {count2}</button>;
35};
36
37export default function App() {
38  const [state, setState] = React.useState({ count1: 0, count2: 0 });
39
40  const incrementCount1 = React.useCallback(() => setState(s => ({ ...s, count1: s.count1 + 1 })), [setState]);
41  const incrementCount2 = React.useCallback(() => setState(s => ({ ...s, count2: s.count2 + 1 })), [setState]);
42
43  return (
44    <div className="App">
45      <CounterProvider
46        value={{
47          count1: state.count1,
48          count2: state.count2,
49          incrementCount1,
50          incrementCount2,
51        }}
52      >
53        <Counter1 />
54        <Counter2 />
55      </CounterProvider>
56    </div>
57  );
58}

useHasParentContext

This helper hook will allow you to know if a component is wrapped by a context selector provider

1const Foo = () => {
2  // An easy way to test if a context provider is wrapped around this component
3  // since it's more complicated to compare with a default context value
4  const isWrappedWithContext = useHasParentContext(CounterContext);
5
6  if (isWrappedWithContext) {
7    return <div>I am inside context selector provider</div>;
8  } else {
9    return <div>I can only use default context value</div>;
10  }
11};

Technical memo

React context by nature triggers propagation of component re-rendering if a value is changed. To avoid this, this library uses undocumented feature of calculateChangedBits. It then uses a subscription model to force update when a component needs to re-render.

Limitations

In order to stop propagation, children of a context provider has to be either created outside of the provider or memoized with React.memo.
<Consumer /> components are not supported.
The stale props issue can't be solved in userland. (workaround with try-catch)

Related projects

The implementation is heavily inspired by:

No vulnerabilities found.

10

Maintained

Determines if the project is "actively maintained".

10

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

10

Dependency-Update-Tool

Determines if the project uses a dependency update tool.

10

Security-Policy

Determines if the project has published a security policy.

10

License

Determines if the project has defined a license.

10

Binary-Artifacts

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

9

Code-Review

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

8

Branch-Protection

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

5

Pinned-Dependencies

Determines if the project has declared and pinned its dependencies.

Reason

dependency not pinned by hash detected -- score normalized to 5

Details

Warn: third-party GitHubAction not pinned by hash: .github/workflows/actions-mention-to-teams.yml:23: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/actions-mention-to-teams.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/check-packages.yml:9: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/check-packages.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/check-packages.yml:11: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/check-packages.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/check-packages.yml:15: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/check-packages.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/check-packages.yml:33: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/check-packages.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/check-packages.yml:37: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/check-packages.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/check-packages.yml:41: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/check-packages.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/docsite-publish.yml:28: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/docsite-publish.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/docsite-publish.yml:32: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/docsite-publish.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/docsite-publish.yml:43: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/docsite-publish.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/docsite-publish.yml:47: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/docsite-publish.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/pr-housekeeping.yml:14: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/pr-housekeeping.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/pr-housekeeping.yml:21: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/pr-housekeeping.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:71: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:82: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:92: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:105: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:116: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:126: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:137: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:148: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:158: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-build.yml:169: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-build.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-run.yml:20: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-run.yml:25: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:31: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:38: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:63: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-run.yml:80: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-run.yml:85: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:91: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:98: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:122: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-run.yml:139: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/screener-run.yml:144: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:150: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:157: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/screener-run.yml:182: update your workflow using https://app.stepsecurity.io/secureworkflow/karansuryadevra/introducing-go-the-book/screener-run.yml/main?enable=pin
Warn: containerImage not pinned by hash: .devcontainer/Dockerfile:5: pin your Docker image by updating mcr.microsoft.com/vscode/devcontainers/javascript-node to mcr.microsoft.com/vscode/devcontainers/javascript-node@sha256:28d382643a2f24b421c5ae65661cb8dec3f4735fdb7427be1634d20aa12466f4
Info: no insecure (not pinned by hash) dependency downloads found in Dockerfiles
Info: no insecure (not pinned by hash) dependency downloads found in shell scripts

0

CII-Best-Practices

Determines if the project has a CII Best Practices Badge.

0

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

Fuzzing

Determines if the project uses fuzzing.

Score

6.4

/10

Last Scanned on 2022-08-15

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

@fluentui/react-context-selector

Installations

Developer Guide

No

CommonJS, ESM

20.19.0

10.8.2

Pull Requests

196

20,216

2,909

17,111

Issues

468

13,346

12,878

Releases

Languages

Developer

Download Statistics

GitHub Statistics

Maintainers

Package Meta Information

Total Downloads

NaN

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

Peer Dependencies

Dev Dependencies

@fluentui/react-context-selector

Introduction

Installation

Usage

Getting started

useHasParentContext

Technical memo

Limitations

Related projects

10

10

10

10

10

10

9

8

5

0

0

0

0

6.4

/10

`@fluentui/react-context-selector`