Better explanation

[pixelass]

Can you please write the following section so others can understand it or better yet provide an example.

Allows you to pass an object to define the <media-query-list> for each <extension-name>. These definitions will override any that exist in the CSS.

[MoOx]

extensions:{
  "--small-viewport": "max-width: 30em",
}

[pixelass]

not sure why this is closed without providing the requested documentation.

I had to look inside the test folder to figure out how it works.
Don't worry though, I'll fork and send you a PR, then you can decide if you want to merge it.

Thx for the quick response though.

[kbytin]

+1 for adding this example to docs