If you want to use add the CSS or any other external classes into your existing div or HTML then simply use the jQuery it works like a pro simple add all the scripts into your HTML pages.
As of jQuery 1.9, passing an array of style properties to.css()will result in an object of property-value pairs. For example, to retrieve all four rendered border-width values, you could use $( elem ).css([ "borderTopWidth", "borderRightWidth", "borderBottomWidth", "borderLeftWidth" ]).
Examples:
Get the background color of a clicked div.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>css demo</title>
<style>
div {
width: 60px;
height: 60px;
margin: 5px;
float: left;
}
</style>
<script src="https://code.jquery.com/jquery-3.4.1.js"></script>
</head>
<body>
<span id="result"> </span>
<div style="background-color:blue;"></div>
<div style="background-color:rgb(15,99,30);"></div>
<div style="background-color:#123456;"></div>
<div style="background-color:#f11;"></div>
<script>
$( "div" ).click(function() {
var color = $( this ).css( "background-color" );
$( "#result" ).html( "That div is <span style='color:" +
color + ";'>" + color + "</span>." );
});
</script>
</body>
</html>simply, Modify that code as per your requirement.
