Well, if we were implementing the equivalent in JS, we'd also use https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputEl... just like this. I think it would maybe be a few lines of javascript at most to do exactly what this is doing. 400ish bytes?

Of course there's always the argument that you'd add more javascript to "framework-ize" this a bit more, but the rust code is just targeting the DOM with IDs, so I don't think it's fair to compare it to any "framework-y" solution.