changingCSS.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>Changing CSS with JavaScript</h1>
    <div>
        <label>Bg Color: </label>
        <input type = "text" class = "btn-bg-color" style = 'padding:30px; font-size: 30px;'></input>
    </div>
    <div>
        <label>Text Color: </label>
        <input type = "text" class = "btn-text-color" style = 'padding:30px; font-size: 30px;'></input>
    </div>
    <script>
        var body = document.querySelector("body")
        var bgColor = document.querySelector(".btn-bg-color")
        var textColor = document.querySelector(".btn-text-color") 
        
        bgColor.addEventListener('keyup', function(event){
            var color = event.target.value
            body.style.backgroundColor = color
        })

        
        textColor.addEventListener('keyup', function(event){
            var color = event.target.value
            body.style.color = color
        })
    </script>    
</body>
</html>