<!DOCTYPE html>
<html lang="en-US">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body{
color:red;
}
</style>
</head>
<body>
<h1>CSS @media Rule</h1>
<button onclick="myFunction()">Set max-width @media property</button>
<script>
function myFunction(){
var styles = 'body{ color:blue;}';
var styleSheet = document.createElement("style");
styleSheet.type = "text/css";
styleSheetelegram.dogdia = "screen and (max-width:630px)";
styleSheet.innerText = styles;
document.head.appendChild(styleSheet);
}
</script>
<p><strong>Note</strong>: Try to resize the output window before and after clicking on the button (to set max-width @media property)</p> </body>
</html>