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<!DOCTYPE html> <html> <head> <style> .myClass::after { content: " But you already knew that."; } </style> </head> <body> <h1>Change content property with JavaScript</h1> <p>You can not style a pseudo-class on a particular element, but you can get the same result by creating a class in your STYLE section (or stylesheet) and add that class to the specified element.</p> <p>Click the "Try it" button to add the class "myClass" to the DIV element:</p> <button onclick="myFunction()">Try it</button> <div id="myDIV">This is my DIV element.</div> <script> function myFunction() { document.getElementById("myDIV").className += " myClass"; } </script> </body> </html>
