<html>
<head>
<style>
.mystyle {
width: 300px;
height: 50px;
background-color: coral;
color: white;
font-size: 25px;
}
</style>
</head>
<body>
<h2>Cross-browser solution for classList.remove()</h2>
<p>The classList property is not supported in Internet Explorer 9 and earlier.</p>
<p>In this example, we check if the browser supports the classList.remove() method. If not, the regular expression works as a fallback to achieve the same result (for IE 9 and earlier).</p>
<p>Click the button to remove the "mystyle" class from DIV.</p>
<button onclick="myFunction()">Try it</button>
<div id="myDIV" class="mystyle">
I am a DIV element
</div>
<script>
function myFunction() {
var x = document.getElementById("myDIV");
if (x.classList) {
x.classList.remove("mystyle");
} else {
x.className = x.className.replace(/\bmystyle\b/g, "");
}
}
</script>
</body>
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</html>