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is-weakset (2.0.4)

Published 2026-02-24 13:58:44 +00:00 by atheaadmin

Installation

Setup this registry in your project .npmrc file:

registry=

To install the package using npm, run the following command:

npm install is-weakset@2.0.4

or add it to the package.json file:

"is-weakset": "2.0.4"

For more information on the npm registry, see the documentation.

About this package

is-weakset

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

Example

var isWeakSet = require('is-weakset');
assert(!isWeakSet(function () {}));
assert(!isWeakSet(null));
assert(!isWeakSet(function* () { yield 42; return Infinity; });
assert(!isWeakSet(Symbol('foo')));
assert(!isWeakSet(1n));
assert(!isWeakSet(Object(1n)));

assert(!isWeakSet(new Set()));
assert(!isWeakSet(new WeakMap()));
assert(!isWeakSet(new Map()));

assert(isWeakSet(new WeakSet()));

class MyWeakSet extends WeakSet {}
assert(isWeakSet(new MyWeakSet()));

Tests

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

Dependencies

Dependencies

ID	Version
call-bound	^1.0.3
get-intrinsic	^1.2.6

Development Dependencies

ID	Version
@arethetypeswrong/cli	^0.17.1
@ljharb/eslint-config	^21.1.1
@ljharb/tsconfig	^0.2.2
@types/for-each	^0.3.3
@types/get-intrinsic	^1.2.3
@types/object-inspect	^1.13.0
@types/tape	^5.7.0
auto-changelog	^2.5.0
core-js	^2.6.12
encoding	^0.1.13
es5-shim	^4.6.7
es6-shim	^0.35.8
eslint	=8.8.0
for-each	^0.3.3
in-publish	^2.0.1
npmignore	^0.3.1
nyc	^10.3.2
object-inspect	^1.13.3
safe-publish-latest	^2.0.0
tape	^5.9.0
typescript	next

Keywords

map weakmap set weakset collection is robust

Details

npm

2026-02-24 13:58:44 +00:00

0

Jordan Harband

Project Site

MIT

latest

7.3 KiB

Assets (1)

is-weakset-2.0.4.tgz 7.3 KiB

Versions (1) View all

2.0.4 2026-02-24