Packages npm engine.io Package · npm
engine.io npm · v6.6.11 · MIT
The realtime engine behind Socket.IO. Provides the foundation of a bidirectional connection between client and server
Tentative categories were assigned with moderate confidence (0.5 to 0.75): they are shown, but they do not count toward a category’s momentum. How categories work
Install npm install engine.ioCopy Adoption
Downloads (30 days) 70.6M Observed downloads / 30 days
Popularity Top 10% on npm Derived 90th percentile within npm
Dependents 259 Observed packages that depend on it
Maintenance 0.89 Derived Release cadence and recency, 0 to 1
Releases per year Not reported Over the package’s life Growth by period Derived by Crest of Tech from two observations of npm’s own figure, a period apart. Nothing is stored or estimated: without an observation near the period’s start, the period is still collecting.
7 days Collecting history Collecting
30 days −0.9% · 30d Derived −628.9K downloads / 30 days, SEP 24 → OCT 24
90 days +10.3% · 90d Derived +6.6M downloads / 30 days, JUL 26 → OCT 24
1 year +92.7% · 1y Derived +34M downloads / 30 days, NOV 10 → OCT 24 Adoption history Adoption historydownloads / 30 days · 14 observations
30d 90d 1y 2y 77.2M 69M SEP 24, 2026: 71,276,302 downloads / 30 days SEP 25, 2026: 71,551,261 downloads / 30 days SEP 26, 2026: 70,138,080 downloads / 30 days SEP 27, 2026: 69,018,302 downloads / 30 days SEP 28, 2026: 71,431,051 downloads / 30 days SEP 29, 2026: 74,008,108 downloads / 30 days SEP 30, 2026: 74,976,793 downloads / 30 days OCT 1, 2026: 75,526,135 downloads / 30 days OCT 2, 2026: 75,462,400 downloads / 30 days OCT 3, 2026: 77,203,583 downloads / 30 days OCT 4, 2026: 75,901,965 downloads / 30 days OCT 5, 2026: 74,305,469 downloads / 30 days OCT 6, 2026: 75,901,965 downloads / 30 days OCT 24, 2026: 70,647,393 downloads / 30 days SEP 24 OCT 9 OCT 24
Table of observations (14) Day downloads / 30 days Dependents OCT 24, 2026 70,647,393 259 OCT 6, 2026 75,901,965 Not observed OCT 5, 2026 74,305,469 Not observed OCT 4, 2026 75,901,965 Not observed OCT 3, 2026 77,203,583 Not observed OCT 2, 2026 75,462,400 Not observed OCT 1, 2026 75,526,135 Not observed SEP 30, 2026 74,976,793 Not observed SEP 29, 2026 74,008,108 Not observed SEP 28, 2026 71,431,051 Not observed SEP 27, 2026 69,018,302 Not observed SEP 26, 2026 70,138,080 Not observed SEP 25, 2026 71,551,261 Not observed SEP 24, 2026 71,276,302 Not observed
Facts from the registry
Latest version v6.6.11
First published Not reported
Last release SEP 24, 2026 30d ago
Licence MIT Repository In the Crest catalog
Bidirectional and low-latency communication for every platform
Language TypeScript
Last push 25d ago
Last release 29d ago Dependencies latest version · v6.6.11 Runtime 9 @types/cors ^2.8.12@types/node >=10.0.0@types/ws ^8.5.12accepts ~1.3.4cookie ~0.7.2cors ~2.8.5debug ~4.4.1engine.io-parser ~5.2.1ws ~8.21.0@socket.io/cluster-adapter The Socket.IO cluster adapter, allowing to broadcast events between several Socket.IO servers Published from the same repository @socket.io/cluster-engine A cluster-friendly engine to share load between multiple Node.js processes (without sticky sessions) Published from the same repository engine.io-client Client for the realtime Engine Published from the same repository engine.io-parser Parser for the client for the realtime Engine Published from the same repository @socket.io/postgres-emitter The Socket.IO Postgres emitter, allowing to communicate with a group of Socket.IO servers from another Node.js process Published from the same repository @socket.io/redis-streams-emitter The Socket.IO Redis streams emitter, allowing to communicate with a group of Socket.IO servers from another Node.js process Published from the same repository NewLife.Core Core library of the NewLife framework: logging (file/network), configuration (XML/JSON/HTTP), cache (memory/distributed), networking (TCP/UDP/HTTP/WebSocket), serialization (binary/XML/JSON), APM tracing, IoC container, actor model, timer scheduler and plugin framework. NativeAOT-ready, with built-in runtime localization; targets 11 frameworks from .NET Framework 4.5 to .NET 10.0. 核心组件库：日志、配置、缓存、网络、序列化、APM 性能追踪、对象容器、并行模型、定时调度与插件框架；原生 AOT 就绪，内置运行时多语言消息；单包覆盖 .NET Framework 4.5 至 .NET 10.0 共 11 个目标框架。 Same primary category opal-server OPAL is an administration layer for Open Policy Agent (OPA), detecting changes to both policy and data and pushing live updates to your agents. The opal-server creates a pub/sub channel clients can subscribe to (i.e: acts as coordinator). The server also tracks a git repository (via webhook) for updates to policy (or static data) and accepts continuous data update notifications via REST api, which are then pushed to clients. Same primary category opal-client OPAL is an administration layer for Open Policy Agent (OPA), detecting changes to both policy and data and pushing live updates to your agents. The opal-client is deployed alongside a policy-store (e.g: OPA), keeping it up-to-date, by connecting to an opal-server and subscribing to pub/sub updates for policy and policy data changes. Same primary category opal-common OPAL is an administration layer for Open Policy Agent (OPA), detecting changes to both policy and data and pushing live updates to your agents. opal-common contains common code used by both opal-client and opal-server. Same primary category svix Svix webhooks API client and webhook verification library Same primary category svix Package Description Same primary category Related news No published news event mentions this package or its repository yet.
