Programming Lilka in mJS | Details | Hackaday.io

<p><a href="https://lilka.dev">Lilka</a> is an open-source handheld console based on the ESP32, built by the Ukrainian maker community 🇺🇦. One of its nicest features is mJS support — which means programs for Lilka can be written in JavaScript, the same language that powers half of the modern web.<br></p> <p>mJS is a tiny JavaScript engine from Cesanta, built specifically for microcontrollers. The syntax is familiar, but standard JS libraries (React, npm modules, and the like) aren't supported — only the basic language and Lilka's own APIs. For simple scripts, that's perfectly fine.</p> <p>And the coolest part — no compilation, no reflashing. A script is just a <code class="bg-text-200/5 border border-0.5 border-border-300 text-danger-000 whitespace-pre-wrap rounded-[0.4rem] px-1 py-px text-[0.9rem]">.js</code> file on the SD card: pick it in the menu and it runs. Edit the code, save, launch again — the whole cycle takes seconds ⚡ That's what makes Lilka such a great platform for tinkering and learning to code.</p><p>A quick note before we dive in: mJS support is a fairly fresh addition to KeiraOS, introduced in v2.6.5 and still actively being developed. Things mostly work, but you might run into the occasional rough edge — for example, an <code class="bg-text-200/5 border border-0.5 border-border-300 text-danger-000 whitespace-pre-wrap rounded-[0.4rem] px-1 py-px text-[0.9rem]">error