HTML | DOM ontoggle Event

The ontoggle event in HTML DOM occurs when the <details> element user opens or closes by the user. The <details> tag is used for the content/information which is initially hidden but could be displayed if the user wishes to see it.

Syntax:

  • In HTML:
    <element ontoggle="Script">
  • In JavaScript:
    object.ontoggle = function(){Script};
  • In JavaScript, using the addEventListener() method:
    object.addEventListener("toggle", Script);

Example:



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<!DOCTYPE html>
<html>
  
<head>
    <title>HTML DOM ontoggle Event</title>
</head>
  
<body>
    <center>
        <h1 style="color:green">GeeksforGeeks</h1>
        <h2>HTML DOM ontoggle Event</h2>
  
        <details id="detailsID">
            <summary>Show details</summary>
            <p>
              5th Floor, A-118, 
              Sector-136, Noida, Uttar Pradesh - 201305 
              feedback@geeksforgeeks.org
            </p>
  
        </details>
  
    </center>
    <script>
        document.getElementById(
          "detailsID").addEventListener("toggle", GFGfun);
  
        function GFGfun() {
            alert("ontoggle");
        }
    </script>
  
</body>
  
</html>

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Output:
Before:

After:

Supported Browsers: The browsers supported by DOM ontoggle Event are listed below:

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


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