class AttribVC: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let g = view.safeAreaLayoutGuide

        var theLabels: [UILabel] = []

        var prevLabel: UILabel!

        for _ in 0..<6 {
            let v = UILabel()
            v.translatesAutoresizingMaskIntoConstraints = false
            view.addSubview(v)
            v.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 20.0).isActive = true
            v.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -20.0).isActive = true
            if prevLabel == nil {
                v.topAnchor.constraint(equalTo: g.topAnchor, constant: 20.0).isActive = true
            } else {
                v.topAnchor.constraint(equalTo: prevLabel.bottomAnchor, constant: 8.0).isActive = true
            }
            theLabels.append(v)
            prevLabel = v
        }

        var attStr: NSMutableAttributedString!
        var attributes: [NSAttributedString.Key: Any] = [:]
        var rangeStr: String = ""
        var termRange: NSRange!

        let html: String = "<p>See additional information</p>"
        guard let encodedText = html.data(using: .utf16) else { return }

        guard let attributedString = try? NSMutableAttributedString(data: encodedText, options: [.documentType: NSAttributedString.DocumentType.html], documentAttributes: nil)
        else { return }

        rangeStr = "See additional information"

        termRange = attributedString.mutableString.range(of: rangeStr)

        // default attributed string
        attStr = NSMutableAttributedString(attributedString: attributedString)
        theLabels[0].attributedText = attStr

        // .strokeWidth and .foregroundColor
        //  results in a black "outline"
        attStr = NSMutableAttributedString(attributedString: attributedString)
        attributes = [.strokeWidth: -3.0, .foregroundColor: UIColor.red]
        attStr.addAttributes(attributes, range: termRange)
        theLabels[1].attributedText = attStr

        // .strokeWidth and .foregroundColor and .strokeColor
        //  results in a "bolded" effect
        attStr = NSMutableAttributedString(attributedString: attributedString)
        attributes = [.strokeWidth: -3.0, .foregroundColor: UIColor.red, .strokeColor: UIColor.red]
        attStr.addAttributes(attributes, range: termRange)
        theLabels[2].attributedText = attStr

        rangeStr = "additional"
        termRange = attributedString.mutableString.range(of: rangeStr)

        // default attributed string
        attStr = NSMutableAttributedString(attributedString: attributedString)
        theLabels[3].attributedText = attStr

        // .strokeWidth and .foregroundColor
        //  results in a black "outline"
        attStr = NSMutableAttributedString(attributedString: attributedString)
        attributes = [.strokeWidth: -3.0, .foregroundColor: UIColor.red]
        attStr.addAttributes(attributes, range: termRange)
        theLabels[4].attributedText = attStr

        // .strokeWidth and .foregroundColor and .strokeColor
        //  results in a "bolded" effect
        attStr = NSMutableAttributedString(attributedString: attributedString)
        attributes = [.strokeWidth: -3.0, .foregroundColor: UIColor.red, .strokeColor: UIColor.red]
        attStr.addAttributes(attributes, range: termRange)
        theLabels[5].attributedText = attStr

    }

}