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HTML | DOM TransitionEvent propertyName Property
  • Last Updated : 31 Jan, 2019

The TransitionEvent propertyName property is a read-only property and used for returning the name of the CSS property associated with a transition when a transitionevent occurs.

Return Value: It returns a string which represents the name of the transition.

Syntax :

event.propertyName

Below program illustrates the TransitionEvent propertyName Property :

Example: Getting the property name associated with the transition.



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<!DOCTYPE html>
<html>
  
<head>
    <title>TransitionEvent propertyName Property
  </title>
    
    <style>
        #MyDiv {
            width: 100px;
            height: 20px;
            background: green;
            transition: 3s;
        }
          
        #MyDiv:hover {
            width: 300px;
        }
          
        h1 {
            color: green;
        }
          
        h2 {
            font-family: Impact;
        }
          
        body {
            text-align: center;
        }
    </style>
</head>
  
    
<body>
  
    <h1>GeeksforGeeks</h1>
    <h2>TransitionEvent propertyName Property</h2>
  
    <p>Hover over the element to see the name of 
      the CSS property the transition effect is for. </p>
  
    <div id="MyDiv"></div>
  
    <script>
        document.getElementById("MyDiv").addEventListener(
          "transitionend", myevent);
  
        function myevent(event) {
            
            //  Return CSS property name.
            this.innerHTML = "CSS Property used: " + 
              event.propertyName;
        }
    </script>
  
</body>
  
</html>

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Output:

Before clicking the button:

After clicking the button:

Supported Browsers:

  • Opera
  • Internet Explorer
  • Google Chrome
  • Firefox
  • Apple Safari

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