</>PackageGraphPackageGraph

jest-circus

npmv30.5.1TypeScript

[type-definitions]: https://github.com/jestjs/jest/blob/main/packages/jest-types/src/Circus.ts

Adopt with care

jest-circus is usable, with caveats. Pulls in 142 transitive packages, about 14 MB installed (at least — some of the tree is still being crawled).

  • ?Adoption: grade ?, Not reported by this registry.

    No download data reported for this package yet.

  • AMaintenance: grade A, Excellent.

    Last published 9 days ago. 27 releases in the last 2 years.

  • DWeight: grade D, Poor — a real concern.

    Pulls in 142 transitive packages, about 14 MB installed (at least — some of the tree is still being crawled).

  • ASupply chain: grade A, Excellent.

    No install scripts, 5 maintainers, and a contained dependency surface.

  • ALicense: grade A, Excellent.

    MIT — permissive, with no copyleft found in the dependency tree.

Grades are computed deterministically from registry metadata collected by PackageGraph — downloads, dependents, publish dates, the resolved dependency tree, maintainer count, and declared licenses. No third-party scores are used.

Install cost

What you actually take on by adding jest-circus to a project.

20
Direct dependencies

Runtime packages this one declares itself.

142
Total installed

Distinct packages in the full runtime tree, deduplicated the way a package manager would.

14 MB
Install size

Unpacked size of this package plus its entire runtime tree.

6
Tree depth

Longest resolved dependency chain below this package.

Part of this dependency tree has not been crawled yet, so these figures are a lower bound rather than a final total.

Licenses in the dependency tree

Apache-2.0BSD-3-ClauseBlueOak-1.0.0ISCMIT

Every license you inherit by installing jest-circus, not just its own. Check this before a legal review, not after.

Compatibility

Node.js
node ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0
Module format
ESM + CommonJS
TypeScript
Types included
Install scripts
None

Quick start

A usage example from the jest-circus README.

tsFull README ↗
import type {Event, State} from 'jest-circus';
import {TestEnvironment as NodeEnvironment} from 'jest-environment-node';

class MyCustomEnvironment extends NodeEnvironment {
  //...

  async handleTestEvent(event: Event, state: State) {
    if (event.name === 'test_start') {
      // ...
    }
  }
}

Dependencies

Declared by jest-circus v30.5.1. Runtime dependencies are installed with the package; dev dependencies are not.

Runtime (20)

@jest/environment 30.5.1@jest/expect 30.5.1@jest/test-result 30.5.1@jest/types 30.5.1@types/node *chalk ^4.1.2co ^4.6.0dedent ^1.6.0is-generator-fn ^2.1.0jest-each 30.5.1jest-matcher-utils 30.5.1jest-message-util 30.5.1jest-runtime 30.5.1jest-snapshot 30.5.1jest-util 30.5.1p-limit ^3.1.0pretty-format 30.5.1pure-rand ^7.0.0slash ^3.0.0stack-utils ^2.0.6

Dev (8)

@babel/core ^7.27.4@babel/register ^7.27.1@types/co ^4.6.6@types/graceful-fs ^4.1.9@types/stack-utils ^2.0.3execa ^5.1.1graceful-fs ^4.2.11tempy ^1.0.1

Used by

Popular packages that depend on jest-circus.

webpacknpm

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

↓ 49.8M/wk◈ 29 dependents⚖ MITTS
jest-confignpm

No description provided.

↓ 0/wk◈ 2 dependents⚖ MITTS

Relationship graph

Dependencies (left) and dependents (right) of jest-circus.

pretty-formatjest-message-utiljest-matcher-utilsstack-utils@jest/environmentp-limitjest-util@types/node@jest/expectjest-runtimejest-snapshotcois-generator-fn@jest/test-resultslashjest-eachpure-rand@jest/typeswebpackjest-configjest-circus
jest-circus dependencies dependents

Frequently installed together

@types/nodenpm

TypeScript definitions for node

↓ 0/wk◈ 327 dependents⚖ MITTS
jest-environment-nodenpm

No description provided.

↓ 0/wk◈ 6 dependents⚖ MITTS
pretty-formatnpm

Stringify any JavaScript value.

↓ 0/wk◈ 20 dependents⚖ MITTS
graceful-fsnpm

A drop-in replacement for fs, making various improvements.

↓ 0/wk◈ 24 dependents⚖ ISC
acornnpm

ECMAScript parser

↓ 221.9M/wk◈ 19 dependents⚖ MITTS
browserslistnpm

Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-env-preset

↓ 170.7M/wk◈ 5 dependents⚖ MITTS
reactnpm

React is a JavaScript library for building user interfaces.

↓ 152.8M/wk◈ 82 dependents⚖ MIT
@types/estreenpm

TypeScript definitions for estree

↓ 152.1M/wk◈ 12 dependents⚖ MITTS
lodashnpm

Lodash modular utilities.

↓ 147.8M/wk◈ 20 dependents⚖ MIT
react-domnpm

React package for working with the DOM.

↓ 143.7M/wk◈ 47 dependents⚖ MIT
eslintnpm

An AST-based pattern checker for JavaScript.

↓ 138.4M/wk◈ 279 dependents⚖ MITTS
prettiernpm

Prettier is an opinionated code formatter

↓ 114.2M/wk◈ 159 dependents⚖ MITTS

Release history

27 releases in the last two years, typically about 4 days apart.

Recent versions of jest-circus
VersionPublishedSizeLicense
30.5.1latest9 days ago163 KBMIT
30.5.012 days ago163 KBMIT
30.4.24 months ago142 KBMIT
30.4.14 months ago142 KBMIT
30.4.04 months ago142 KBMIT
30.3.06 months ago138 KBMIT
30.2.011 months ago187 KBMIT
30.1.31 year ago187 KBMIT
30.1.21 year ago187 KBMIT
30.1.11 year ago187 KBMIT
30.1.01 year ago187 KBMIT
30.0.51 year ago187 KBMIT
30.0.41 year ago187 KBMIT
30.0.31 year ago187 KBMIT
30.0.21 year ago139 KBMIT

Overview

jest-circus is an npm package that [type-definitions]: https://github.com/jestjs/jest/blob/main/packages/jest-types/src/Circus.ts. It has 2 known dependents in the graph. The latest version is 30.5.1, released under the MIT license.

Who should use it

Teams working in the npm ecosystem who need [type-definitions]: https://github.com/jestjs/jest/blob/main/packages/jest-types/src/Circus.ts and value a focused solution.

When not to use it

Consider an alternative if you need to minimize your dependency tree, or if a more actively-maintained option better fits your npm stack.

Pros

  • Ships TypeScript type definitions.
  • Clear open-source license (MIT).

Cons

  • Large dependency tree (28 direct dependencies) increases install size and audit surface.

Auto-generated from collected registry metadata. No external claims are inferred.

Maintainers

aaronabramovcpojeropenjs-operationsrickhanloniisimenb

Frequently asked questions

Should I use jest-circus?

jest-circus is usable, with caveats. Pulls in 142 transitive packages, about 14 MB installed (at least — some of the tree is still being crawled).

How do I install jest-circus?

Run `npm install jest-circus` to add jest-circus to your npm project.

How many dependencies does jest-circus have?

jest-circus declares 28 direct dependencies and pulls in 142 packages in total once its runtime tree is resolved totalling about 14 MB on disk.

What license is jest-circus released under?

jest-circus is distributed under the MIT license. Its dependency tree also includes: Apache-2.0, BSD-3-Clause, BlueOak-1.0.0, ISC, MIT.

How popular is jest-circus?

npm does not publish download counts. Within PackageGraph's crawl, 2 known packages depend on jest-circus.

Is jest-circus still maintained?

The most recent release of jest-circus (v30.5.1) was published 9 days ago.

Does jest-circus run install scripts?

No. jest-circus does not define preinstall, install, or postinstall scripts, so installing it does not execute publisher-supplied code.