How to create: Syntax Highlighter

Learn how to create and use syntax highlighters.

Syntax Highlighter

When you add some color to code snippets, they are easier to read:

<!DOCTYPE html> <html> <body> <h1>Testing an HTML Syntax Highlighter</h2> <p>Hello world!</p> <a href="https://www.codew3c.com">Back to School</a> </body> </html>









How to create a syntax highlighter


Step 1 - Add HTML:


A <div> containing HTML code:


<div id="myDiv">
<!DOCTYPE html><br>
<html><br>
<body><br>
<br>
<h1>Testing an HTML Syntax Highlighter</h2><br>
<p>Hello world!</p><br>
<a href="https://www.codew3c.com">Back to School</a><br>
<br>
</body><br>
</html>
</div>



Step 2 - Add JavaScript:


Create a function named "w3CodeColor" and use a DIV element as an argument to call it:


w3CodeColor(document.getElementById("myDiv"));
function w3CodeColor(elmnt) {
  // click "Try it Yourself" to see the JavaScript...
}



Try It Yourself