W3.CSS provides excellent support for syntax highlighting of the following languages −
HTML − Use classes w3-code htmlHigh on the container having HTML Code.
CSS − Use classes w3-code cssHigh on the container having CSS Code.
JS − Use classes w3-code jsHigh on the container having CSS Code.
You have to include the following script to have a link to the js file to have the syntax highlighting support −
<script src = "https://www.w3schools.com/lib/w3codecolors.js"></script>
<html> <head> <title>The W3.CSS Syntax Highlighter</title> <meta name = "viewport" content = "width = device-width, initial-scale = 1"> <link rel = "stylesheet" href = "https://www.w3schools.com/lib/w3.css"> </head> <body> <header class = "w3-container w3-teal"> <h2>HTML Syntax Highlighted</h2> </header> <div class = "w3-code htmlHigh"> <html> <head> <title>The W3.CSS Example</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="css/w3.css"> </head> <body> <header class="w3-container w3-teal"> <h1>Hello World!</h1> </header> </body> </html> </div> <header class="w3-container w3-teal"> <h2>CSS Syntax Highlighted</h2> </header> <div class = "w3-code cssHigh"> .bold { font-weight:bold; } #boldLabel { font-weight:bold; } table, th, td { font-family:sans; } </div> <header class = "w3-container w3-teal"> <h2>JS Syntax Highlighted</h2> </header> <div class = "w3-code cssHigh"> <script type="text/javascript"> function(message){ } var message = "Hello, World!"; alert(message); </script> </div> <script src="https://www.w3schools.com/lib/w3codecolors.js"></script> </body> </html>
Verify the result.