index.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=device-width, initial-scale=1.0">
    <title>Text formatter</title>
    <link rel= "icon" href="https://image.flaticon.com/icons/png/128/3940/3940014.png">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css">
</head>
<style>
        body {
    max-width: 700px;
    margin: auto;
    text-align: center;
    background: url('https://images.pexels.com/photos/1103970/pexels-photo-1103970.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940');
    background-repeat: no-repeat;
    background-size: auto;
}

p {
    width: 300px;
    background: white;
    color: black;
    height: 80px;
    box-shadow: 0 0 5px 2px rgba(0, 0, 0, 0.50);
    border: 1px solid #555;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: auto;
    margin-top: 3rem;
}

h2 {
    color: black;
}
</style>
<body>
    <h2>Type in your words to see them in the Output!</h2>
    <input type="text" id= "inputField"/>

    <button class="btn uppercase red darken-1" style="text-transform: uppercase">abc</button>
    <button class="btn lowercase green darken-1" style="text-transform: lowercase">abc</button>
    <button class="btn capitalize purple darken-1" style="text-transform: capitalize">abc</button>
    <button class="btn bold grey darken-4" style="text-transform: capitalize">B</button>
    <button class="btn italic grey darken-4" style="font-style: italic;">i</button>
    <button class="btn underline grey darken-4" style="text-decoration: underline;">abc</button>
    <p id= "outputField">Output</p>

    <script src="./index.js"></script>
</body>
</html>