Detect browser TLS compatibility

Question

We have a SSL website where the host has recently disabled older SSL protocols like TLS 1.0 and below. Depending on the browser, the site visitor gets a blank page or a cryptic

Answer 1

Small note; code aside I think folks should be aware if you're presenting your end user with an error message regarding this, you should understand that TLS versions is not just a browser restriction, but essentially OS level. You have to have it enabled on your machine and your browser must support it. You can be on the latest chrome, but if in Internet Settings (on Windows) it's been disabled, you'll still have a TLS negotiation issue.