You don't need any of it. You can write vanilla JS, using ES6 classes, as web components and be done with the whole front-end framework game. All you need for data-binding is an Observable of some kind that can loop through listeners for events and call their handler. Component classes all have a render function so that React kids feel at home. Those components are registered using CustomElementRegistry.define [1]. Tools like vite help roll up all that code and styles into a minified bundle but doesn't include all the crap that these "modern" frameworks add. Take this from someone who has been writing web sites since 1996. You don't need any of those frameworks unless you're looking to give away control of your product to the roadmap of the framework or need to hire a bunch of people to accomplish something quickly and all they know is React.

[1] https://developer.mozilla.org/en-US/docs/Web/API/CustomEleme...