Get Fonts from Website

colr.js

// via https://stackoverflow.com/a/39900099
function listFonts () {
  let fonts = []
  for (let node of document.querySelectorAll('*')) {
    if (!node.style) continue
    for (let pseudo of ['', ':before', ':after']) {
      let fontFamily = getComputedStyle(node, pseudo).fontFamily
      fonts = fonts.concat(fontFamily.split(/\n*,\n*/g))
    }
  }
  return [...new Set(fonts)]
    .map(font => font.replace(/^\s*['"]([^'"]*)['"]\s*$/, '$1').trim())
}
listFonts()
//amazon.com
// ['Times', 'Amazon Ember', 'Arial', 'sans-serif', 'Arial', 'Helvetica', 'VideoJS', 'AmazonEmber-Bold', 'Amazon Ember', 'Lucida Sans Unicode', 'Arial Unicode MS']0: "Times"1: "Amazon Ember"2: "Arial"3: "sans-serif"4: "Arial"5: "Helvetica"6: "VideoJS"7: "AmazonEmber-Bold"8: "Amazon Ember"9: "Lucida Sans Unicode"10: "Arial Unicode MS"length: 11[[Prototype]]: Array(0)