window.print_example_js.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=h1, initial-scale=1.0">
    <title>Document</title>
    <style>
        h1{
            text-align: center;
        }
        h3{
            text-align: center;
        }
        button{
            width: 20vh;
            height: 10vh;
            display: block;
            margin-left: auto;
            margin-right: auto;
            margin-top: 5vh;
            border: none;
            padding: 5px;
            background-color: white;
            box-shadow: rgba(17, 17, 26, 0.05) 0px 1px 0px, rgba(17, 17, 26, 0.1) 0px 0px 8px;
        }
        i{
            color: darkorchid;
        }
    </style>
</head>
<body>
    <h1>Javascript example</h1>
    <h3>Print this page using <i> window.print() </i></h3>
    <button type="button" onclick="printFunction()">Print</button>

    <script>
        function printFunction(){
            window.print();
        }
    </script>

</body>
</html>