What’s New in Deno 2.0: 10 Features You Should Know
Deno 2.0 introduces a suite of enhancements aimed at improving performance, compatibility, and developer experience. Here are ten key features:
1. Enhanced Node.js Compatibility: Deno 2.0 significantly improves compatibility with Node.js APIs, allowing developers to run existing Node applications more seamlessly. This includes support for package.json, node_modules, and private npm registries.
2. Native TypeScript Support: Deno continues to offer out-of-the-box TypeScript support, enabling developers to write type-safe code without additional configuration or tooling.
3. Built-in Tooling: The runtime includes integrated tools such as a formatter, linter, test runner, and bundler, reducing the need for external dependencies and streamlining the development workflow.
4. Improved Performance: Deno 2.0 delivers better startup times, reduced memory usage, and more efficient HTTP handling, thanks to updates in the V8 JavaScript engine.
5. Simplified Package Management: New commands like deno add, deno remove, and deno install simplify dependency management, eliminating the need for traditional package managers.
6. Advanced Security Model: Deno maintains a secure-by-default approach, offering a permissions system that restricts access to the file system, network, and environment variables.
7. Web Standards Alignment: The runtime embraces web standards such as the Fetch API, URL, and ES Modules, ensuring consistency between server and browser environments.
8. Deno Tasks: Introduced in Deno 2.0, tasks allow developers to define project-specific scripts in a deno.json file, similar to npm scripts, facilitating automation and consistency.
9. Stabilized Standard Library: The standard library has been stabilized, providing a reliable set of modules for common tasks, enhancing code maintainability and reuse.
10. Deno Deploy Integration: Deno 2.0 continues to support Deno Deploy, enabling seamless deployment of applications to edge locations for improved latency and performance.
These features collectively position Deno 2.0 as a modern, secure, and efficient runtime for JavaScript and TypeScript development.
