Cloudflare is an extremely-common service that does SSL-interception on tons of websites. If I hosted a website (with some kind of user-messaging functionality

Cloudflare is an extremely-common service that does SSL-interception on tons of websites. If I hosted a website (with some kind of user-messaging functionality) on Cloudflare, and I trusted Cloudflare to not modify the data that went through them, but I was worried that they may be recording all the data that went through them, then using a javascript end-to-end encryption library would be perfect for my case.