test

<html>

<head>
<meta name=viewport content="initial-scale=1,maximum-scale=2,minimum-scale=1,user-scalable=no,width=device-width">
<style>

body {
    padding: 0;
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}
div {
    width: 100%;
    height: 1000;
    background-color: green;
}

h1 {
    color: white;
}

</style>

</head>

<body>

<div>
<h1>I am an <i>h1 HTML</i> tag</h2>
<button onClick="onButtonClick()">
Do not click me!
</button>
</div>

</body>
</html>