Preload google subsets font

loadFonts.js

let googleFontUrl = "https://fonts.googleapis.com/css2?family=Rubik:wght@900&family=Roboto:wght@700&family=Josefin+Sans:wght@700&family=Raleway:ital,wght@1,800&family=Inconsolata:wght@400&family=Nunito:wght@400&family=Oswald:wght@400&family=Righteous:wght@400&family=Bitter:wght@700&family=Nunito:wght@700&family=Scheherazade:wght@400&family=Noto+Sans:wght@400&family=Nova+Round:wght@400&family=Lato:wght@400&family=Noto+Sans:wght@700&family=Playfair+Display:wght@700&family=Seymour+One:wght@400&family=Arvo:wght@700&family=Poppins:wght@700&family=Lato:wght@900&family=Open+Sans:wght@400&family=Pacifico:wght@400&family=Josefin+Sans:wght@400&family=Arvo:wght@400&family=Playfair+Display:wght@400&family=Oswald:wght@700&family=Zeyada:wght@400&family=Montserrat+Alternates:wght@600&family=Poppins:wght@400&family=Ubuntu:wght@400&family=Roboto:wght@400&family=Poppins:wght@800&family=Rubik:wght@400&family=Bangers:wght@400&family=Concert+One:wght@400&family=Open+Sans:wght@700&family=Montserrat:wght@800&family=Dancing+Script:wght@400&family=Fjalla+One:wght@400&family=Ubuntu:wght@700&family=Inconsolata:wght@700&family=Bitter:wght@400&family=Contrail+One:wght@400&family=Caveat:wght@400&display=swap"
 
fetch(googleFontUrl).then((response) => response.text()).then((result) => {
  let subsetMap = getSubsetFontMapFromFontFaceCss(result);
  Object.entries(subsetMap).forEach(([subset, fontUrls])=>{
    if(subset == "cyrillic"){
      fontUrls.forEach((furl) => {
        var link = document.createElement('link');
        link.rel = 'preload';
        link.href = furl;
        link.as = "font";
        link.type= "font/woff2";
        link.crossorigin = "anonymous";
        document.head.appendChild(link);
      })
    }
  })
});

function getSubsetFontMapFromFontFaceCss(text){
  const fontUrls = text.match(/\/\*[^}]*}/g);

  const fontObjects = fontUrls.map(fontUrl => {
    const subset = fontUrl.match(/\/\*(.*?)\*\//)[1].trim();
    const url = fontUrl.match(/url\((.*?)\)/)[1];
    return { subset, url };
  });

  const groupedFonts = fontObjects.reduce((acc, font) => {
    acc[font.subset] = acc[font.subset] || [];
    if(!acc[font.subset].includes(font.url)){
      acc[font.subset].push(font.url);
    } 
    return acc;
  }, {});

  return groupedFonts;
}