force validation of min/max values on Byte Value inputs

[crashdemons]

doesn't seem to be enforced in firefox or chrome [despite being set] when typing in manually.

[crashdemons]

browser prompts for validity don't get triggered for two reasons:

• the button for combining inputs isn't a Submit type of input or submit button
• the output portion of the app is technically a separate <form> tag for styling reasons

a solution is to put the entire app into the same form and change the button to submit. although there needs to be a way to cancel navigation from submitting the form and instead call the xor script.

Alternatively, we can check ourselves:

https://caniuse.com/?search=checkValidity
input.checkValidity() doesn't force the browser prompt for validity though, an overlay or alert would need to be shown.
polyfill or wrapper seems doable for this method?