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For example, running the following command allows for both read and write access to the entire file system: $ node -experimental-permission -allow-fs-read= * -allow-fs-write= * index.jsĭevelopers can also specify specific paths for file system access by passing in comma-separated values to the flags. To enable these flags, developers can use the -experimental-permission flag along with the desired permissions. These experimental features allow for more granular control over which parts of the file system can be accessed by Node.js processes. When starting Node.js with -experimental-permission, the ability to access the file system, spawn processes, and use node:worker_threads will be restricted.ĭevelopers using Node.js now have more control over file system access with the introduction of the -allow-fs-read and -allow-fs-write flags.

The available permissions are documented by the -experimental-permission

Restrict access to native addons (same as -no-addons flag).

Use -allow-fs-read and -allow-fs-write.

Restrict access to the file system (read and write).

In this first release containing the Permission Model, the features come with the following abilities: The Node.js Permission Model is an experimental mechanism for restricting access to specific resources during execution.

We encourage you to explore the new features and benefits offered by this latest release and evaluate their potential impact on your applications. You can find the release post at, which contains the full list of commits included in this release.Īs a reminder, Node.js 20 will enter long-term support (LTS) in October, but until then, it will be the 'Current' release for the next six months. You can read more about our release policy at.

This blog post will add some additional context on the larger body of work in relation to those changes. For that reason, the changes outlined in the changelog for Node.js 20 only represent a small subset of the features and work since the last major release. The project continues to make progress across a number of areas, with many new features and fixes flowing into existing LTS releases. We're excited to announce the release of Node.js 20! Highlights include the new Node.js Permission Model,a synchronous, a stable test_runner, updates of the V8 JavaScript engine to 11.3, Ada to 2.0, Node.js 20 is now available! By The Node.js Project, Apr 18, 2023

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