Try it Editor: CSS - The ::before Pseudo-element

Edit This Code :


<!DOCTYPE html>
<html>
<head>
<style>
h1::before {
    content: url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKmI9oMQ_pha6nqhoN2MsEoDE52c9-HtYJdg2ESrpw9HQ-0xv51Tujhyqvw7Yh_bewAj21_x_4zloNouHZtMzmiswrSXs-rY6e7wqywqC4uACdZjirH7tEyo9N8lB8egxhPmxCnUvIstci/s50/img_mountains.jpg);
}
</style>
</head>
<body>

<h1>This is a heading</h1>
<p>The ::before pseudo-element inserts content before the content of an element.</p>

<h1>This is a heading</h1>
<p><b>Note:</b> IE8 supports the content property only if a !DOCTYPE is specified.</p>

</body>
</html>

Result :