This document outlines my philosphy of webapps.
My webapps are coded mostly in Elm. They compile to a single elm.js
file. Downloading that file, and associated index.html and images
and other JavaScript files is the ONLY interaction your browser has
with my server. In particular, your browser will never WRITE anything
to my server. I remember nothing about you, since I never know more
than your IP address, when you download the code, and I don't remember
that.
Of course, you can't take my word for that. You'll have to either watch your network traffic, or rely on the opinion of somebody you already trust.