npm · npm:is-weakref

is-weakref active

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

The latest stable version of is-weakref is 1.1.1, published on 2025-02-03. Verified by Vigia on 2026-11-12.

Latest stable version	1.1.1
Published	2025-02-03 23:37:46 UTC
Install	`npm install is-weakref@latest`
Requires (engines)	`{"node":">= 0.4"}`
Peer dependencies	—
Dist-tags	`latest: 1.1.1`
License	MIT
Advisories on latest version	none known
Last verified	2026-11-12 12:59:36 UTC
Sources	api.deps.dev, registry.npmjs.org, registry.npmjs.org

Ask your AI assistant to check this

AI models are trained up to a date, so they can be wrong about versions, deprecations and vulnerabilities. Paste this into Claude, ChatGPT, Perplexity or Cursor and it will answer with the verified data on this page:

Before answering about the npm package "is-weakref", check Vigia (verified, dated facts): https://vigia.coredls.cloud/v1/packages/npm/is-weakref . For my whole project use https://vigia.coredls.cloud/context

Check my whole package.json

Using an AI coding agent every day? Connect Vigia once and it checks this by itself.

Maintenance

Activity	dormant
Last stable release	2025-02-03 23:37:46 UTC · 647 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
`1.1.1`	2025-02-03 23:37:46 UTC
`1.1.0`	2024-12-13 16:01:46 UTC
`1.0.2`	2021-12-10 16:46:37 UTC
`1.0.1`	2020-12-05 00:04:02 UTC
`1.0.0`	2020-08-02 06:14:23 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`	`1.1.1`
`node 18`	`1.1.1`
`node 20`	`1.1.1`
`node 22`	`1.1.1`
`node 24`	`1.1.1`

Give your AI agent these facts

Vigia is a free MCP server: your coding agent checks versions, breaking changes and vulnerabilities before it writes code. No signup, no API key.

claude mcp add --transport http vigia https://vigia.coredls.cloud/mcp

Add to Cursor Add to VS Code ★ Star on GitHub

Any other MCP client

{ "mcpServers": { "vigia": { "url": "https://vigia.coredls.cloud/mcp" } } }

Agent skill (SKILL.md): tells the agent when to use Vigia · GitHub Action for pull requests

Frequently asked questions

What is the latest version of is-weakref?

The latest stable version of is-weakref is 1.1.1, published on 2025-02-03. Verified by Vigia on 2026-11-12.

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

Run npm install is-weakref@latest. The latest stable version is 1.1.1 (verified 2026-11-12).

Is is-weakref deprecated?

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

Which Node.js version does is-weakref require?

is-weakref 1.1.1 declares this requirement: {"node":">= 0.4"}.

Does is-weakref 1.1.1 have known vulnerabilities?

No known advisories affect is-weakref 1.1.1 according to the data Vigia checks.

Is is-weakref still maintained?

is-weakref published 0 stable releases in the last 12 months; the most recent was 647 days ago. Activity: dormant.

Observed changes

No changes observed yet since Vigia started tracking this package.

Related packages

Badges for your README

Show the latest version, maintenance status and deprecation status of this package. Copy the Markdown:

[![version](https://vigia.coredls.cloud/badge/npm/is-weakref/version.svg)](https://vigia.coredls.cloud/npm/is-weakref)
[![maintained](https://vigia.coredls.cloud/badge/npm/is-weakref/maintained.svg)](https://vigia.coredls.cloud/npm/is-weakref)
[![status](https://vigia.coredls.cloud/badge/npm/is-weakref/status.svg)](https://vigia.coredls.cloud/npm/is-weakref)

For agents

GET https://vigia.coredls.cloud/v1/packages/npm/is-weakref
GET https://vigia.coredls.cloud/v1/packages/npm/is-weakref/versions/{version}