Looking at a site in the wild I see the following in the page source:

"minViewportAspectRatio":0.40000000000000002220446049250313080847263336181640625,"maxViewportAspectRatio":2.5

This is a laughable minViewportAspectRatio. Nevertheless, the values 0.4 and 2.5 are what show up in the source:

Aren't floating point numbers fun.

I'm not sure how having such a long decimal would be prevented, as the return value of the functions there is sent straight to be exported as JSON here:

Not a big issue.