importCss function

void importCss (String url, [ String mediaQuery = '' ])

CSS's @import.

importCss("url('https://fonts.googleapis.com/css?family=Roboto')", 'screen');

Implementation

void importCss(String url, [String mediaQuery = '']) {
  if (!url.startsWith(url) && !url.startsWith('"') && !url.startsWith("'")) {
    url = '"$url"';
  }
  sheet.addFirst('@import $url $mediaQuery;');
}