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Gathering detailed insights and metrics for is-weakmap

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Gathering detailed insights and metrics for is-weakmap

is-weakmap - 2.0.2 | npmpackage.info

is-weakmap

Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

2.0.2

MIT

JavaScript

305.00 B

2,046,546,085 4.4

Installations

npm install is-weakmap

Developer Guide

BETA

Typescript

Yes

Module System

CommonJS

Min. Node Version

>= 0.4

Node Version

21.7.0

NPM Version

10.5.0 Score

99.5

Supply Chain

81.6

Quality

75.5

Maintenance

100

Vulnerability

100

License

Pull Requests

Open

0

Total

5

Closed

0

Merged

5

Issues

Open

1

Total

4

Closed

3

Releases

Unable to fetch releases

Languages

JavaScript

JavaScript (100%)

Developer

inspect-js

Download Statistics

Total Downloads

2,046,546,085

Last Day

1,540,656

Last Week

27,479,127

Last Month

117,280,340

Last Year

1,067,977,991

GitHub Statistics

MIT License

3 Stars

53 Commits

1 Forks

3 Watchers

2 Branches

1 Contributors

Updated on Nov 12, 2024

Bundle Size

556.00 B

Minified

305.00 B

Minified + Gzipped

Bundlephobia

Sponsor this package

https://github.com/sponsors/ljharb

Maintainers

View All 1 Contributors

Package Meta Information

Latest Version

2.0.2

Package Id

is-weakmap@2.0.2

Unpacked Size

20.09 kB

Size

7.61 kB

File Count

NPM Version

10.5.0

Node Version

21.7.0

Published on

Mar 08, 2024

Total Downloads

Cumulative downloads

Total Downloads

2,046,546,085

Last Day

-3.5%

1,540,656

Compared to previous day

Last Week

-6.2%

27,479,127

Compared to previous week

Last Month

-1.4%

117,280,340

Compared to previous month

Last Year

70.2%

1,067,977,991

Compared to previous year

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dev Dependencies

@arethetypeswrong/cli @ljharb/eslint-config @types/for-each @types/object-inspect @types/tape aud auto-changelog core-js es5-shim es6-shim eslint for-each in-publish npmignore nyc object-inspect safe-publish-latest tape typescript

is-weakmap

Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Example

1var isWeakMap = require('is-weakmap');
2assert(!isWeakMap(function () {}));
3assert(!isWeakMap(null));
4assert(!isWeakMap(function* () { yield 42; return Infinity; });
5assert(!isWeakMap(Symbol('foo')));
6assert(!isWeakMap(1n));
7assert(!isWeakMap(Object(1n)));
8
9assert(!isWeakMap(new Set()));
10assert(!isWeakMap(new WeakSet()));
11assert(!isWeakMap(new Map()));
12
13assert(isWeakMap(new WeakMap()));
14
15class MyWeakMap extends WeakMap {}
16assert(isWeakMap(new MyWeakMap()));

Tests

Simply clone the repo, npm install, and run npm test

No vulnerabilities found.

10

Binary-Artifacts

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

10

Dangerous-Workflow

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

10

License

Determines if the project has defined a license.

10

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

9

Security-Policy

Determines if the project has published a security policy.

0

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

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

0

Token-Permissions

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

0

CII-Best-Practices

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

0

Fuzzing

Determines if the project uses fuzzing.

0

SAST

Determines if the project uses static code analysis.

Score

4.4

/10

Last Scanned on 2025-06-30

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.

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