Remove elemento class

remover algum elemento do class form-control btn etc

by Rapha Souza

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.mystyle {
    width: 100%;
    padding: 25px;
    background-color: coral;
    color: white;
    font-size: 25px;
    box-sizing: border-box;
}
</style>
</head>
<body>

<p>Click the "Try it" button to remove the "mystyle" class from the DIV element:</p>

<button onclick="myFunction()">Try it</button>

<div id="myDIV" class="mystyle form-control">
This is a DIV element.
</div>

<script>
function myFunction() {
   var element = document.getElementById("myDIV");
   element.classList.remove("mystyle");
}
</script>

</body>
</html>