How to detect type of iPad model.

getIpadModel.js

// iPad model checks.
const getiPadModel = () => {
  if (window.screen.height / window.screen.width == 1024 / 768) {
    // iPad, iPad 2, iPad Mini
    if (window.devicePixelRatio == 1) {
      return "iPad 1, iPad 2, iPad Mini 1";
    }
    // iPad 3, 4, 5, Mini 2, Mini 3, Mini 4, Air, Air 2, Pro 9.7
    else {
      return "iPad 3, iPad 4, iPad 5, iPad Air 1, iPad Air 2, iPad Mini 2, iPad Mini 3, iPad Mini 4, iPad Pro 9.7";
    }
  }
  // iPad Pro 10.5
  else if (window.screen.height / window.screen.width == 1112 / 834) {
    return "iPad Pro 10.5";
  }
  // iPad Pro 12.9, Pro 12.9 (2nd Gen)
  else if (window.screen.height / window.screen.width == 1366 / 1024) {
    return "iPad Pro 12.9, Pro 12.9 (2nd Gen)";
  }
  // Not an ipad
  else {
    return "Not an iPad";
  }
}