Set the name of the CSS property the transition effect is for

CSS Web Development Front End Technology

To set the name of the CSS property the transition effect is, use the CSS transition-property.

In the below example, we have set the property as width and set the duration as well:

Example

<!DOCTYPE html>
<html>
   <head>
      <style>
         div {
            width: 150px;
            height: 150px;
            background: blue;
            transition-property: width;
            transition-duration: 3s;
         }
         div:hover {
            width: 250px;
         }
      </style>
   </head>
   <body>
      <h1>Heading One</h1>
      <p>Hover over the below box to change its width.</p>
      <div></div>
   </body>
</html>