lecture0Javascript/color0.html at master · testgug3/lecture0Javascript · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Color 0</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script>
        document.addEventListener('DOMContentLoaded',function(){

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

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

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