<p>You are taken into the inner workings of JavaScript runtimes by building one! Creating Jade — a minimal JS runtime in C using JavaScriptCore and libuv — is the subject of this tutorial. Understand how modern runtimes tie JavaScript to system-level operations, how the event loop is implemented, and how native APIs are then exposed. A must-read for any developer wondering what really goes on inside Node.js, Bun, and Deno.</p>
<p><a href="https://devlogs.xyz/blog/building-a-javaScript-runtime" target="_blank" rel="noopener nofollow">Full tutorial with code</a></p>


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Learn how JavaScript runtimes work by building Jade, a minimal runtime in C using JavaScriptCore and libuv. Explores the connection between JavaScript and system-level operations, event loop implementation, and native API exposure. Provides hands-on insight into the architecture behind Node.js, Bun, and Deno.

Built a JavaScript runtime in C to understand how Node.js, Bun & Deno actually work