npm · npm:is-observable

is-observable active

Check if a value is an Observable

The latest stable version of is-observable is 3.0.0, published on 2022-06-06. Verified by Vigia on 2026-11-12.

Latest stable version	3.0.0
Published	2022-06-06 11:21:36 UTC
Install	`npm install is-observable@latest`
Requires (engines)	`{"node":">=14.16"}`
Peer dependencies	—
Dist-tags	`latest: 3.0.0`
License	MIT
Advisories on latest version	none known
Last verified	2026-11-12 12:08:39 UTC
Sources	api.deps.dev, registry.npmjs.org, registry.npmjs.org

Maintenance

Activity	dormant
Last stable release	2022-06-06 11:21:36 UTC · 1620 days ago
Stable releases in the last 12 months	0
Published versions	7

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

Version history

Version	Published
`3.0.0`	2022-06-06 11:21:36 UTC
`2.1.0`	2020-08-02 11:35:45 UTC
`2.0.0`	2019-05-28 16:06:37 UTC
`1.1.0`	2017-12-07 21:23:55 UTC
`1.0.0`	2017-11-03 05:23:44 UTC
`0.2.0`	2016-04-19 19:44:58 UTC
`0.1.0`	2015-11-19 13:44:32 UTC

Showing the 7 most recent of 7 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`	`3.0.0`
`node 18`	`3.0.0`
`node 20`	`3.0.0`
`node 22`	`3.0.0`
`node 24`	`3.0.0`

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-observable?

The latest stable version of is-observable is 3.0.0, published on 2022-06-06. Verified by Vigia on 2026-11-12.

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

Run npm install is-observable@latest. The latest stable version is 3.0.0 (verified 2026-11-12).

Is is-observable deprecated?

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

Which Node.js version does is-observable require?

is-observable 3.0.0 declares this requirement: {"node":">=14.16"}.

Does is-observable 3.0.0 have known vulnerabilities?

No known advisories affect is-observable 3.0.0 according to the data Vigia checks.

Is is-observable still maintained?

is-observable published 0 stable releases in the last 12 months; the most recent was 1620 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-observable/version.svg)](https://vigia.coredls.cloud/npm/is-observable)
[![maintained](https://vigia.coredls.cloud/badge/npm/is-observable/maintained.svg)](https://vigia.coredls.cloud/npm/is-observable)
[![status](https://vigia.coredls.cloud/badge/npm/is-observable/status.svg)](https://vigia.coredls.cloud/npm/is-observable)

For agents

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