Use the [attribute|=”value”] selector to select elements with the specified attribute starting with a specified value.
You can try to run the following code to implement CSS [attribute|=”value”] Selector,
Example
<!DOCTYPE html>
<html>
<head>
<style>
[lang| = en] {
border: 5px solid orange;
border-radius: 5px;
}
</style>
</head>
<body>
<p lang = "en">Hello</p>
<p lang = "no">Hei</p>
</body>
</html>