CSS Imports

Loop through all the stylesheets requested by the page and count any @import statements to return how many stylesheets were loaded via @import.

[css-imports]
let requests = $WPT_BODIES;
let cssBodies = requests.filter(request => request.type == "Stylesheet");
let re = /@import/g;
let importCount = 0;
cssBodies.forEach((file) => {
        importCount += ((file.response_body || '').match(re) || []).length;
    }
)
return importCount;