Writing automations in pure JavaScript—is this possible?

[puzzle-star (Pedro)]

@kettlepot

I imagine this all could be done by writing my own software and using the Websocket JS API but again that would require me to manage the scripts themselves, set them up and launch them as daemons, and manage their lifecycle if I have to update them or if something crashes. It’d all be easier with a “managed” approach similar to what Node-RED provides.

I wonder if anything like this exists for HA?

This is an old and recurring topic.

I ended up developing my own solution for personal use, but I have decided to make it publicly available after more than a year of stable use.

Use JavaScript for your automations

This is an external engine that exposes Home Assistant entities and services to JavaScript scripts. It works by connecting to HASS WebSocket API, and encapsulates all available entities as JS objects to be able to simply interact with them using JavaScript. Scripts are constantly monitored in the scripts directory. They will be loaded when the service is started, reloaded when modified, and unloaded when deleted (also before reload). JSON files will also be monitored and (re)loaded automatic…

Hopefully this will help.