CS50-Web-Programming-with-Python-and-JavaScript/lecture5/colors0.html at master · python-test-code/CS50-Web-Programming-with-Python-and-JavaScript · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <script>
            document.addEventListener('DOMContentLoaded', function() {

                // Change font color to red
                document.querySelector('#red').onclick = function() {
                    document.querySelector('#hello').style.color = 'red';
                };

                // Change font color to blue
                document.querySelector('#blue').onclick = function() {
                    document.querySelector('#hello').style.color = 'blue';
                };

                // Change font color to green
                document.querySelector('#green').onclick = function() {
                    document.querySelector('#hello').style.color = 'green';
                };
            });
        </script>
        <title>My Website</title>
    </head>
    <body>
        <h1 id="hello">Hello!</h1>
        <button id="red">Red</button>
        <button id="blue">Blue</button>
        <button id="green">Green</button>
    </body>
</html>