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<!DOCTYPE html> <html> <style> #myDIV { width: 100%; height: 50px; padding: 16px; background: orange; position: relative; font-size: 20px; text-align: center; animation: mymove 4s infinite; } @keyframes mymove { from {top: 0px;} to {top: 200px;} } </style> <body> <h1>Animation Events</h1> <h2>The elapsedTime Property</h2> <p>This example uses the addEventListener() method to attach an "animationstart" and "animationiteration" event to a DIV element.</p> <p>The elapsedTime property returns the number of seconds the animation has been running:</p> <div id="myDIV">The animation has started</div> <script> const div = document.getElementById("myDIV"); div.addEventListener("animationiteration", myRepeatFunction); function myRepeatFunction(event) { this.style.backgroundColor = "lightblue"; this.innerHTML = "Elapsed time: " + event.elapsedTime + " seconds"; } </script> </body> </html>