Is a JavaScript runtime built on Chrome`s V8 JavaScript engine

Node.js for Mac

Node.js for Mac

  -  80.17 MB  -  Open Source
  • Latest Version

    Node.js 22.9.0 LATEST

  • Review by

    Daniel Leblanc

  • Operating System

    macOS 10.12 Sierra or later

  • User Rating

    Click to vote
  • Author / Product

    Node.js Foundation / External Link

  • Filename

    node-v22.9.0.pkg

  • MD5 Checksum

    3e0af014c39cc1d40b4ee4c14d020b24

As an asynchronous event-driven JavaScript runtime, Node for Mac is designed to build scalable network applications. In the following "hello world" example, many connections can be handled concurrently. Upon each connection, the callback is fired, but if there is no work to be done, Node for macOS will sleep.

This is in contrast to today's more common concurrency model where OS threads are employed. Thread-based networking is relatively inefficient and very difficult to use. Furthermore, users of Nodejs are free from worries of dead-locking the process, since there are no locks. Almost no function in the app directly performs I/O, so the process never blocks. Because nothing blocks, scalable systems are very reasonable to develop in Node.

Node.js is similar in design to and influenced by, systems like Ruby's Event Machine or Python's Twisted. It takes the event model a bit further. It presents an event loop as a runtime construct instead of a library. In other systems, there is always a blocking call to start the event-loop. Typically behavior is defined through callbacks at the beginning of a script and at the end starts a server through a blocking call like EventMachine::run(). In Node js, there is no such start-the-event-loop call. It simply enters the event loop after executing the input script. The tool exits the event loop when there are no more callbacks to perform. This behavior is like browser JavaScript — the event loop is hidden from the user.

HTTP is a first-class citizen in Nodejs, designed with streaming and low latency in mind. This makes Node js well suited for the foundation of a web library or framework.

Just because Nodejs is designed without threads, doesn't mean you cannot take advantage of multiple cores in your environment. Child processes can be spawned by using child_process.fork() API, and are designed to be easy to communicate with. Built upon that same interface is the cluster module, which allows you to share sockets between processes to enable load balancing over your cores.

Also Available: Download Node.js for Windows

  • Node.js 22.9.0 Screenshots

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    Node.js 22.9.0 Screenshot 1
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  • Node.js 22.9.0 Screenshot 3
  • Node.js 22.9.0 Screenshot 4

What's new in this version:

New API to retrieve execution Stack Trace:
- A new API getCallSite has been introduced to the util module. This API allows users to retrieve the stacktrace of the current execution.

Disable V8 Maglev:
- We have seen several crashes/unexpected JS behaviors with maglev on v22 (which ships V8 v12.4). The bugs lie in the codegen so it would be difficult for users to work around them or even figure out where the bugs are coming from. Some bugs are fixed in the upstream while some others probably remain.
- As v22 will get stuck with V8 v12.4 as LTS, it will be increasingly difficult to backport patches for them even if the bugs are fixed. So disable it by default on v22 to reduce the churn and troubles for users.

Exposes X509_V_FLAG_PARTIAL_CHAIN to tls.createSecureContext:
- This releases introduces a new option to the API tls.createSecureContext. For now on users can use tls.createSecureContext({ allowPartialTrustChain: true }) to treat intermediate (non-self-signed) certificates in the trust CA certificate list as trusted.

Other Notable Changes:
- src: create handle scope in FastInternalModuleStat
- (SEMVER-MINOR) stream: relocate the status checking code in the onwritecomplete

Deprecations:
- repl: doc-deprecate instantiating node:repl classes without new
- zlib: deprecate instantiating classes without new