Deno 1.40 introduces ECMAScript decorator syntax, enhancing code expressiveness and supporting new features like improved diagnostics and built-in Node.js APIs.
Developing cross-platform apps with Bun v1.1 - LogRocket Blog
Bun is a new JavaScript runtime addressing performance challenges in Node.js and Deno, running directly on the JavaScriptCore engine for faster code execution and better compatibility with npm packages.