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<html>
    <head>
        <title>
            Mengubah Properti CSS dengan Javascript
        </title>
    </head>
    <body>
        <p style="color: green;">Lorem ipsum dolor sit amet consectetur adipisicing elit. Voluptates porro nam ea incidunt deleniti nostrum nesciunt cumque, laborum laboriosam eligendi rerum a veniam vitae suscipit totam minima explicabo doloremque libero.</p>

        <button onclick="changeColor()">Ubah Warna</button>

        <script>
            // membuat function di javascript
            // formatnya nggak boleh ada spasi, boleh pakai underscore
            function changeColor(){
                var kalimat = document.getElementsByTagName('p');
                kalimat[0].style.color = "blue";
                kalimat[0].style.fontWeight = "bold";
            }
        </script>
    </body>
</html>