Try it Yourself: CSS Outline

CSS Outline

<!DOCTYPE html>
<html>
<head>
<style>
.box-a {
  outline-style: solid;
  outline-width: 3px;
}

.box-b {
  outline-style: solid;
  outline-width: thick;
}
</style>
</head>
<body>

<div class="box-a">Box A</div>
<div class="box-b">Box B</div>

</body>
</html>

<!DOCTYPE html>
<html>
<head>
<style>
.box-a {
  outline-style: solid;
  outline-width: 3px;
}

.box-b {
  outline-style: solid;
  outline-width: thick;
}
</style>
</head>
<body>

<div class="box-a">Box A</div>
<div class="box-b">Box B</div>

</body>
</html>