engine.io-client 3.3.1

Client for the realtime Engine

engine.io-client@3.3.1 was published on 2018-11-19. Its manifest declares 11 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 engine.io-client versions · Permanent reference to 3.3.1 · Latest release

Package specifications

Version	3.3.1
License declaration	MIT
Published	2018-11-19T21:28:46.822Z
Node.js requirement	Not declared
Type declarations	Not declared
Runtime dependency count	11
Peer requirement count	0
Optional dependency count	0
Minified size	Measurement not available yet
Minified + gzip	Measurement not available yet
Unpacked distribution size	171.71 KiB
Published file count	13
Package type	Not declared
ES module entry	Not declared
Default entry	lib/index.js
Side effects declaration	Not declared
Direct advisories	0
Resolved graph dependencies	21
Repository stars	63225
Repository forks	10218

Install engine.io-client 3.3.1

npm install engine.io-client@3.3.1
pnpm add engine.io-client@3.3.1
yarn add engine.io-client@3.3.1

Runtime dependencies

ws ~6.1.0
debug ~3.1.0
yeast 0.1.2
indexof 0.0.1
parseqs 0.0.5
has-cors 1.1.0
parseuri 0.0.5
engine.io-parser ~2.1.1
component-emitter 1.2.1
component-inherit 0.0.3
xmlhttprequest-ssl ~1.5.4

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.

after@0.8.2 — indirect
arraybuffer.slice@0.0.7 — indirect
async-limiter@1.0.1 — indirect
base64-arraybuffer@0.1.5 — indirect
better-assert@1.0.2 — indirect
blob@0.0.5 — indirect
callsite@1.0.0 — indirect
component-emitter@1.2.1 — direct
component-inherit@0.0.3 — direct
debug@3.1.0 — direct
engine.io-parser@2.1.3 — direct
has-binary2@1.0.3 — indirect
has-cors@1.1.0 — direct
indexof@0.0.1 — direct
isarray@2.0.1 — indirect
ms@2.0.0 — indirect
parseqs@0.0.5 — direct
parseuri@0.0.5 — direct
ws@6.1.4 — direct
xmlhttprequest-ssl@1.5.5 — direct
yeast@0.1.2 — direct

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.

OpenSSF repository checks

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

Code-Review	1/10 — Found 3/30 approved changesets -- score normalized to 1
Maintained	10/10 — 30 commit(s) and 20 issue activity found in the last 90 days -- score normalized to 10
Security-Policy	10/10 — security policy file detected
Dangerous-Workflow	10/10 — no dangerous workflow patterns detected
CII-Best-Practices	0/10 — no effort to earn an OpenSSF best practices badge detected
Token-Permissions	9/10 — detected GitHub workflow tokens with excessive permissions
Binary-Artifacts	9/10 — binaries present in source code
License	10/10 — license file detected
Fuzzing	0/10 — project is not fuzzed
SAST	0/10 — SAST tool is not run on all commits -- score normalized to 0
Packaging	10/10 — packaging workflow detected
Pinned-Dependencies	2/10 — dependency not pinned by hash detected -- score normalized to 2

Evidence and freshness

https://registry.npmjs.org/engine.io-client/3.3.1 — retrieved 2026-10-29T09:23:03.401Z
https://api.deps.dev/v3/projects/github.com%2Fsocketio%2Fsocket.io — retrieved 2026-10-29T05:09:27.248Z
https://api.deps.dev/v3/systems/npm/packages/engine.io-client/versions/3.3.1 — retrieved 2026-10-29T09:23:03.946Z
https://api.deps.dev/v3/systems/npm/packages/engine.io-client/versions/3.3.1:dependencies — retrieved 2026-10-29T09:23:03.974Z