Is this repo no longer maintained?

[ffxsam]

disregard. was able to patch this using Yarn 3.x.

The contributors should at least have the courtesy of modifying the README file to state that this package is abandonware, so people don't waste time writing code and opening PRs.

[ToshioMagic]

Agreed. I've banged my head on my desk for 3 days before I found out this isn't maintained.

[CarlosBalladares]

any alternatives for the browser?

[nandlab]

any alternatives for the browser?

There is also MQTT.js.

[davidhmays]

I'm struggling to get type definitions for the browser version of MQTT.js.
The NPM version has working type definitions, but won't work in the browser as it uses some things like process.env that only work in a Node environment.

[robertsLando]

MQTTjs has full typescript support starting from version 5 and there have been many improvements on browser side in latest versions. see https://github.com/mqttjs/MQTT.js/releases