To set outline properties, use the outline property. It allows you to set the color, style, and offset of the outline.
Example
You can try to run the following code to set all the outline properties in one declaration with JavaScript −
<!DOCTYPE html>
<html>
<head>
<style>
#box {
width: 450px;
background-color: orange;
border: 3px solid red;
}
</style>
</head>
<body>
<p>Click below to add Outline.</p>
<div id="box">
<p>This is a div. This is a div. This is a div. This is a div. This is a div.</p>
<p>This is a div. This is a div. This is a div. This is a div. This is a div.</p>
<p>This is a div. This is a div. This is a div. This is a div. This is a div.</p>
</div>
<br>
<button type="button" onclick="display()">Set Outline</button>
<br>
<script>
function display() {
document.getElementById("box").style.outline = "thick solid #5F5F5F";
}
</script>
</body>
</html>