Use the marginRight property in JavaScript, to set the right margin. You can try to run the following code to set the right margin of an element with JavaScript −
Example
<!DOCTYPE html>
<html>
<head>
<style>
#myID {
border: 2px solid #000000;
}
</style>
</head>
<body>
<div id="myID">This is demo text.</div><br>
<button type="button" onclick="display()">Add right margin</button>
<script>
function display() {
document.getElementById("myID").style.marginRight = "150px";
}
</script>
</body>
</html>