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<!DOCTYPE html> <html> <style> .myStyle { background-color: coral; padding: 16px; } .class1 { text-align: center; } .class2 { font-size: 25px; } </style> <body> <h1>The Element Object</h1> <h2>The className Property</h2> <button onclick="myFunction()">Add</button> <p>Click "Add" to add additional classes to "myDIV".</p> <div id="myDIV" class="myStyle"> <p>I am myDIV.</p> </div> <script> function myFunction() { document.getElementById("myDIV").className += " class1 class2"; } </script> </body> </html>
