Use the border-top property in CSS to set all the top border properties in a single declaration.
Example
You can try to run the following code to implement the border-top property −
<!DOCTYPE html>
<html>
<head>
<style>
p {
border-style: solid;
border-top: thick dashed #FFFF00;
}
</style>
</head>
<body>
<p>This is demo text</p>
</body>
</html>