Notable Changes

Experimental Network Inspection Support in Node.js

This update introduces the initial support for network inspection in Node.js. Currently, this is an experimental feature, so you need to enable it using the --experimental-network-inspection flag. With this feature enabled, you can inspect network activities occurring within a JavaScript application.

To use network inspection, start your Node.js application with the following command:

$ node --inspect-wait --experimental-network-inspection index.js

Please note that the network inspection capabilities are in active development. We are actively working on enhancing this feature and will continue to expand its functionality in future updates.

• Network inspection is limited to the http and https modules only.
• The Network tab in Chrome DevTools will not be available until the feature request on the Chrome DevTools side...

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. Example:

const util = require('node:util');

function exampleFunction() {
  const callSites = util.getCallSite();

  console.log('Call Sites:');
  callSites.forEach((callSite, index) => {
    console.log(`CallSite ${index + 1}:`);
    console.log(`Function Name: ${callSite.functionName}`);
    console.log(`Script Name: ${callSite.scriptName}`);
    console.log(`Line Number: ${callSite.lineNumber}`);
    console.log(`Column Number: ${callSite.column}`);
  });
  // CallSite 1:
  // Function Name: exampleFunction
  // Script Name: /home/example.js
  // Line Number: 5
  // Column Number: 26

  // CallSite 2:
  // Function Name: anotherFunction
  // Script Name: /home/example.js
  // Line Number: 22
  // Column Number: 3

  // ...
}

// A function to simulate another stack layer
function anotherF...

New JS API for compile cache

This release adds a new API module.enableCompileCache() that can be used to enable on-disk code caching of all modules loaded after this API is called. Previously this could only be enabled by the NODE_COMPILE_CACHE environment variable, so it could only set by end-users. This API allows tooling and library authors to enable caching of their own code. This is a built-in alternative to the v8-compile-cache/v8-compile-cache-lib packages, but have better performance and supports ESM.

Thanks to Joyee Cheung for working on this.

New option for vm.createContext() to create a context with a freezable globalThis

Node.js implements a flavor of vm.createContext() and friends that creates a context without contextifying its global object when vm.constants.DONT_CONTEXTIFY is...

Experimental transform types support

With the new flag --experimental-transform-types it is possible to enable the transformation of TypeScript-only syntax into JavaScript code.

This feature allows Node.js to support TypeScript syntax such as Enum and namespace.

Thanks to Marco Ippolito for making this work on #54283.

Module syntax detection is now enabled by default.

Module syntax detection (the --experimental-detect-module flag) is now enabled by default. Use --no-experimental-detect-module to disable it if needed.

Syntax detection attempts to run ambiguous files as CommonJS, and if the module fails to parse as CommonJS due to ES module syntax, Node.js tries again and runs the file as an ES module. Ambiguous files are those with a .js or no extension, where the nearest parent package.json has no "type" field (either "type": "module" or "type": "commonjs"). Syntax detection should have no performance imp...

module: support require()ing synchronous ESM graphs

This release adds require() support for synchronous ESM graphs under the flag --experimental-require-module.

If --experimental-require-module is enabled, and the ECMAScript module being loaded by require() meets the following requirements:

• Explicitly marked as an ES module with a "type": "module" field in the closest package.json or a .mjs extension.
• Fully synchronous (contains no top-level await).

require() will load the requested module as an ES Module, and return the module name space object. In this case it is similar to dynamic import() but is run synchronously and returns the name space object directly.

Contributed by Joyee Cheung in #51977

path: add matchesGlob method

Glob patterns can now be tested against individual paths via the path.matchesGlob(path, pattern) method.

Contributed by Aviv Keller in [#52881](https://github.co...

Experimental TypeScript support via strip types

Node.js introduces the --experimental-strip-types flag for initial TypeScript support. This feature strips type annotations from .ts files, allowing them to run without transforming TypeScript-specific syntax. Current limitations include:

• Supports only inline type annotations, not features like enums or namespaces.
• Requires explicit file extensions in import and require statements.
• Enforces the use of the type keyword for type imports to avoid runtime errors.
• Disabled for TypeScript in node_modules by default.

Thanks Marco Ippolito for working on this.

Experimental Network Inspection Support in Node.js

This update introduces the initial support for network inspection in Node.js. Currently, this is an experimental feature, so you need to enable it using the --experimental-network-inspection flag. With this feature enabled, you can inspect network activiti...