Ngôn ngữ CSS - Thuộc tính outline
Thuộc tính outline
<!DOCTYPE html>
<html>
<head>
<style>
p {
border: 2px solid black;
outline: #4CAF50 solid 10px;
margin: auto;
padding: 20px;
text-align: center;
}
</style>
</head>
<body>
<h2>CSS Outline</h2>
<p>This element has a 2px black border and a green outline with a width of 10px.</p>
</body>
</html>
