Immutable.js 1.2.0

efficient immutable data-structures in javascript.

immutable@1.2.0 was published on 2013-05-24. Its manifest declares 2 runtime dependencies and 0 peer requirements. Bundled type declarations are not declared in the inspected metadata. No Node.js engine requirement is declared in this manifest.

All Immutable.js versions · Permanent reference to 1.2.0 · Latest release

Package specifications

Version1.2.0
License declarationBSD
Published2013-05-24T22:00:52.658Z
Node.js requirementNot declared
Type declarationsNot declared
Runtime dependency count2
Peer requirement count0
Optional dependency count0
Minified sizeMeasurement not available yet
Minified + gzipMeasurement not available yet
Unpacked distribution sizeNot supplied
Published file countNot supplied
Package typeNot declared
ES module entryNot declared
Default entrysrc/immutable.js
Side effects declarationNot declared
Direct advisories3
Resolved graph dependencies2
Repository stars33026
Repository forks1862

Install Immutable.js 1.2.0

npm install immutable@1.2.0
pnpm add immutable@1.2.0
yarn add immutable@1.2.0

Runtime dependencies

Peer requirements

  • None declared

Optional dependencies

  • None declared

Resolved dependency graph

This deps.dev graph describes a generic 64-bit Linux environment, not your application lockfile.

How to interpret the specifications

Bundlephobia measurements use its standard package build and may exclude peer dependencies. Unpacked npm distribution size includes shipped files and is a different measurement. Module declarations do not prove tree-shaking or runtime compatibility.

Advisories apply to this package version directly; transitive dependencies need separate inspection. Repository signals describe the whole repository and are current observations, including on historical-version pages.

Known direct advisories

OpenSSF repository checks

Provider assessment: 2026-08-24T00:00:00Z. These are repository checks, not a jsL maintenance score.

Code-Review1/10 — Found 1/6 approved changesets -- score normalized to 1
Security-Policy10/10 — security policy file detected
Dangerous-Workflow10/10 — no dangerous workflow patterns detected
Maintained10/10 — 30 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 10
Token-Permissions0/10 — detected GitHub workflow tokens with excessive permissions
CII-Best-Practices0/10 — no effort to earn an OpenSSF best practices badge detected
Binary-Artifacts10/10 — no binaries found in the repo
Pinned-Dependencies5/10 — dependency not pinned by hash detected -- score normalized to 5
License10/10 — license file detected
Fuzzing10/10 — project is fuzzed
Packaging10/10 — packaging workflow detected
SAST8/10 — SAST tool is not run on all commits -- score normalized to 8

Evidence and freshness