To set the type of line in text-decoration, use the textDecorationLine property. You can try to run the following code to return the type of line in a text-decoration with JavaScript −
Example
<!DOCTYPE html>
<html>
<body>
<div id = "myText" style = "text-decoration: underline;">
This is demo text.
</div>
<br>
<button onclick="display()"> Set Text Decoration </button>
<script>
function display() {
document.getElementById("myText").style.textDecorationColor = "red";
document.getElementById("myText").style.textDecorationLine = "overline";
}
</script>
</body>
</html>