jsPrinterMachine

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Study</title>
</head>
<body>
    <div id="output"></div>
    <script>
        `use strict`

        function PrinterMachine(fontColor, fontSize, fontFamily, outputId = 'output') {
            this._fontColor = fontColor;
            this._fontSize = fontSize;
            this._fontFamily = fontFamily;

            this.print = function(message = 'Nice day to learn JS!')
            {
                output.innerHTML += `<h2 style="font-size: ${this._fontSize}px; color: ${this._fontColor}; font-family: ${this._fontFamily}"">${message}</h2>`;
            }

        }

        {
            let printer1 = new PrinterMachine('red', 20, 'sans');
            let printer2 = new PrinterMachine('blue', 50, 'cursive');

            printer1.print();
            printer2.print('Nice day to kill DJ ;]');
            printer1.print('London is a capital of... who knows what!? :(')
        }

    </script>
</body>
</html>