Node.js has supported the protocol node: for a while. Module specifiers with this prefix always refer to built-in modules, never to modules in node_modules. 'node:test' is the first core module where this protocol is mandatory, with more to follow. The post describes the upsides and downsides of this approach.

The blog post describes the ECMAScript proposal “Change Array by copy” by Robin Ricard and Ashley Claymore. It proposes four new methods for Arrays and Typed Arrays:

• .toReversed()
• .toSorted()
• .toSpliced()
• .with()

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[Quoting the repository’s readme file.]

Run your JavaScript on WebAssembly. Javy takes your JavaScript code, and executes it in a WebAssembly embedded JavaScript runtime.

Javy is currently used for the beta Shopify Scripts platform. We intend on supporting and improving this runtime in that context. Eventually this project should be a good general purpose JavaScript runtime but that is not the current goal.

JS Party: “There’s a new proposal in ECMAScript town to enable type annotations in JavaScript code by having JS engines ignore them at runtime. This has large implications and we’ve gathered two folks from the TypeScript team (Ryan Cavanaugh, Daniel Rosenwasser) to talk through them with us!”