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<html><head><style> div { width: 100px; height: 100px; background: red; transition-property: width, height; transition-duration: 2s;}div:hover { width: 300px; height: 300px;}</style></head><body><h1>The transition-property Property</h1><div></div><p>Hover over the div element above, to see the transition effect.</p></body></html>