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<html><head><style> #myDIV { width: 100px; height: 100px; background: yellow; transition: 2s; /* For Safari 3.1 to 6.0 */ transition: 2s;}#myDIV:hover { width: 400px;}</style></head><body><p>Hover over the div element below, and wait for the transition effect to end.</p><p>The elapsedTime property returns the number of seconds the transition effect has been running.</p><div id="myDIV"></div><script>// Code for Safari 3.1 to 6.0document.getElementById("myDIV").addEventListener("webkitTransitionEnd", myFunction);// Standard syntaxdocument.getElementById("myDIV").addEventListener("transitionend", myFunction);function myFunction(event) { this.innerHTML = "Transition lasted: " + event.elapsedTime + " seconds";}</script></body></html>