Vigia

npm · npm:is-extendable

is-extendable active

Returns true if a value is a plain object, array or function.

The latest stable version of is-extendable is 1.0.1, published on 2017-09-11. Verified by Vigia on 2026-11-12.

Latest stable version1.0.1
Published2017-09-11 20:38:26 UTC
Installnpm install is-extendable@latest
Requires (engines){"node":">=0.10.0"}
Peer dependencies—
Dist-tagslatest: 1.0.1
LicenseMIT
Advisories on latest versionnone known
Last verified2026-11-12 13:08:34 UTC
Sourcesapi.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-extendable", check Vigia (verified, dated facts): https://vigia.coredls.cloud/v1/packages/npm/is-extendable . 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

Activitydormant
Last stable release2017-09-11 20:38:26 UTC · 3349 days ago
Stable releases in the last 12 months0
Published versions4

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

Version history

VersionPublished
1.0.12017-09-11 20:38:26 UTC
1.0.02017-07-20 21:07:29 UTC
0.1.12015-07-04 22:50:11 UTC
0.1.02015-06-29 03:05:39 UTC

Showing the 4 most recent of 4 versions. JSON

Version compatibility

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

RuntimeNewest compatible version
node 161.0.1
node 181.0.1
node 201.0.1
node 221.0.1
node 241.0.1

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 CursorAdd 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-extendable?

The latest stable version of is-extendable is 1.0.1, published on 2017-09-11. Verified by Vigia on 2026-11-12.

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

Run npm install is-extendable@latest. The latest stable version is 1.0.1 (verified 2026-11-12).

Is is-extendable deprecated?

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

Which Node.js version does is-extendable require?

is-extendable 1.0.1 declares this requirement: {"node":">=0.10.0"}.

Does is-extendable 1.0.1 have known vulnerabilities?

No known advisories affect is-extendable 1.0.1 according to the data Vigia checks.

Is is-extendable still maintained?

is-extendable published 0 stable releases in the last 12 months; the most recent was 3349 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-extendable/version.svg)](https://vigia.coredls.cloud/npm/is-extendable)
[![maintained](https://vigia.coredls.cloud/badge/npm/is-extendable/maintained.svg)](https://vigia.coredls.cloud/npm/is-extendable)
[![status](https://vigia.coredls.cloud/badge/npm/is-extendable/status.svg)](https://vigia.coredls.cloud/npm/is-extendable)

For agents

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