modern-editor VS Svelte

> "building a text-annotation based app"

I'm going to assume that you are talking about a desktop-based webapp that is also responsive, and not a native app. I also believe you when you say that you do not know where you are getting into.

I have 10+ years of experience doing front-end, with probably over a dozen React packages self-published in npm, and also tried making a rich text editor ~6 years back[1]. I actually recommend starting with no framework at all (please read on).

Creating a rich text editor might be the hardest thing you can do in "normal" front-end (excluding some more advanced "frontend" fields like 3D or games). You can either manipulate raw cursors, which will be very tricky because I'm not even sure you have access to all the right APIs (specially on mobile), or you can attempt to use Contenteditable, which is a hell of its own[2].

"All problems start with caret placing and multi browser support" [3]

That said, I believe 90% of the complexity of your app will be here, around the actual interaction with the or <div contenteditable> that you will be using. For that, no framework will really help you, at all. So my recommendation is to first get that working, which will take weeks/months and hundreds or thousands of lines of code, and then worry about placing the little hovering boxes in their place (the "UI"), which is like 10 lines of JS/CSS[4].<p>[1] <a href="https://github.com/franciscop/modern-editor" rel="nofollow">https://github.com/franciscop/modern-editor</a><p>[2] <a href="https://answerly.io/blog/my-pain-developing-a-wysiwyg-editor-with-contenteditable/" rel="nofollow">https://answerly.io/blog/my-pain-developing-a-wysiwyg-editor...</a><p>[3] <a href="https://news.ycombinator.com/item?id=27938702" rel="nofollow">https://news.ycombinator.com/item?id=27938702</a><p>[4] <a href="https://stackoverflow.com/q/4495626/938236" rel="nofollow">https://stackoverflow.com/q/4495626/938236</a>

the technical decision how Svelte should treat self-closing html elements was hindered by Prettier:

Svelte

React has introduced measures like batching state updates, background concurrent rendering and memoization to tackle this. My opinion is that the best way to solve the problem is by improving their reactivity model. The app needs to be able to track the code that should be re-run on updating a given state variable and specifically update the UI corresponding to this update. Tools like solid.js and svelte work in this manner. It also eliminates the need for a virtual DOM and diffing.

Similarly to Promises/A+, this effort focuses on aligning the JavaScript ecosystem. If this alignment is successful, then a standard could emerge, based on that experience. Several framework authors are collaborating here on a common model which could back their reactivity core. The current draft is based on design input from the authors/maintainers of Angular, Bubble, Ember, FAST, MobX, Preact, Qwik, RxJS, Solid, Starbeam, Svelte, Vue, Wiz, and more…

Svelte is a powerful web framework that offers a fresh approach to building web applications. Its simplicity, reactivity model, and built-in features make it an excellent choice for developers looking to create efficient and maintainable applications. By following this guide, you should now have a good understanding of how to get started with Svelte and build your first components, routes, and transitions. You can read more about svelte on the official Svelte website.

Use .NET features (especially dotnet watch) as a setup for a client-side Svelte application, starting from a simple C# console app.