What do you mean by "lighter than a React button"? Do you mean lighter than the entire React runtime, plus a React button?
If so, that's somewhat disingenuous because even though a page with a single button would require the entire runtime, a second React button would be significantly cheaper than that.
If so, that's somewhat disingenuous because even though a page with a single button would require the entire runtime, a second React button would be significantly cheaper than that.