npm · npm:is-weakmap

is-weakmap active

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

The latest stable version of is-weakmap is 2.0.2, published on 2024-03-08. Verified by Vigia on 2026-11-12.

Latest stable version	2.0.2
Published	2024-03-08 20:18:32 UTC
Install	`npm install is-weakmap@latest`
Requires (engines)	`{"node":">= 0.4"}`
Peer dependencies	—
Dist-tags	`latest: 2.0.2`
License	MIT
Advisories on latest version	none known
Last verified	2026-11-12 13:09:35 UTC
Sources	api.deps.dev, registry.npmjs.org, registry.npmjs.org

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Maintenance

Activity	dormant
Last stable release	2024-03-08 20:18:32 UTC · 979 days ago
Stable releases in the last 12 months	0
Published versions	5

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

Version	Published
`2.0.2`	2024-03-08 20:18:32 UTC
`2.0.1`	2019-12-18 04:46:33 UTC
`2.0.0`	2019-11-12 20:23:36 UTC
`1.0.1`	2015-08-31 20:09:06 UTC
`1.0.0`	2015-02-18 12:32:27 UTC

Showing the 5 most recent of 5 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

Runtime	Newest compatible version
`node 16`	`2.0.2`
`node 18`	`2.0.2`
`node 20`	`2.0.2`
`node 22`	`2.0.2`
`node 24`	`2.0.2`

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Frequently asked questions

What is the latest version of is-weakmap?

The latest stable version of is-weakmap is 2.0.2, published on 2024-03-08. Verified by Vigia on 2026-11-12.

How do I install the latest version of is-weakmap?

Run npm install is-weakmap@latest. The latest stable version is 2.0.2 (verified 2026-11-12).

Is is-weakmap deprecated?

No. is-weakmap is not marked as deprecated in the registry.

Which Node.js version does is-weakmap require?

is-weakmap 2.0.2 declares this requirement: {"node":">= 0.4"}.

Does is-weakmap 2.0.2 have known vulnerabilities?

No known advisories affect is-weakmap 2.0.2 according to the data Vigia checks.

Is is-weakmap still maintained?

is-weakmap published 0 stable releases in the last 12 months; the most recent was 979 days ago. Activity: dormant.

Observed changes

No changes observed yet since Vigia started tracking this package.

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