Ask HN: Qt style "Signals and Slots" based JavaScript UI library?
Are there any equivalent of Qt style loosely coupled "Signals and Slots" based JavaScript UI library? Qt allows widget/ components to be connected to each other with a pub-sub type of system where the emitter of the signal really need not care who the consumer is. While, IIUC, most JS libraries follow a hierarchically coupled state passing system where sharing of state happens through props/ passing down from parent to child components with lifted state etc., Was wondering if there are any JS libraries which operate in the style of Qt event driven signal-slot connections as a primary paradigm.
The first thing that comes to mind is that Qt now has a WebAssembly port[1] using Emscripten[2], so depending on your use-case, you could possibly just run Qt on the Web platform and avoid the need for a JavaScript framework entirely.
[1]: https://doc.qt.io/qt-5/wasm.html
[2]: https://emscripten.org
Not sure how it works in Qt, but in regular React you'd just use a shared Context that all the components and their children can access. That way you don't have to explicitly pass props and setters and getters back and forth.