I'd agree with all these, but if I understood correctly OP wants to annotate static text rather than edit. OP this is an interesting and rather niche area, you

I'd agree with all these, but if I understood correctly OP wants to annotate static text rather than edit. OP this is an interesting and rather niche area, you will want to be making use of the selection API[0] and figuring out a good way to make it reactive to integrate with react and your data model. [0]: https://developer.mozilla.org/en-US/docs/Web/API/Selection https://developer.mozilla.org/en-US/docs/Web/API/Selection