HTML | DOM Details Object

Last Updated : 11 Jul, 2025

The DOM Details Object is used to represent the HTML <details> element. The Details element is accessed by getElementById().

Properties:

open: The details tag has an attribute called 'open' which is used to display the hidden information by default.

Syntax:

document.getElementById("ID");

Where “id” is the ID assigned to the “details” tag.

Example-1:

HTML

<!DOCTYPE html>
<html>

<head>
    <title>DOM details Object</title>
    <style>
        h2 {
            color: green;
            font-size: 35px;
        }
        
        summary {
            font-size: 40px;
            color: #090;
            font-weight: bold;
        }
    </style>
</head>

<body>
    <center>
        <h2>DOM Details Object </h2>

        <!-- assigning id to details tag. -->
        <details id="GFG">
            <summary>GeeksforGeeks</summary>
            

<p>A computer science portal for geeks</p>


            <div>It is a computer science portal
                 where you can learn programming.</div>
        </details>

        <br>
        <button onclick="myGeeks()">Submit</button>
        <script>
            function myGeeks() {
                // Accessing details tag.
                var x = document.getElementById("GFG");
                
                // Display hidden information
                // using open property. 
                x.open = true;
            }
        </script>
    </center>
</body>

</html>

Output:
Before Clicking On Button :

After Clicking n Button:

Example-2: Details Object can be created by using the document.createElement method.

HTML

<!DOCTYPE html>
<html>

<head>
    <title>HTML DOM Details Object</title>
    <style>
        h1,
        h2 {
            text-align: center;
        }
        
        h1 {
            color: green;
        }
        
        button {
            margin-left: 40%;
        }
        
        details {
            font-size: 30px;
            color: green;
            text-align: center;
            margin-top: 30px;
        }
    </style>
</head>

<body>
    <h1>GeeksforGeeks</h1>
    <h2>DOM Details Object</h2>
    <button onclick="myGeeks()">Submit</button>

    <script>
        function myGeeks() {
            var g = document.createElement("DETAILS");
            g.setAttribute("id", "GFG");
            document.body.appendChild(g);

            var f = document.createElement("SUMMARY");
            var text = document.createTextNode("GeeksForGeeks");
            f.appendChild(text);

            document.getElementById("GFG").appendChild(f);

            var z = document.createElement("p");
            var text2 = document.createTextNode(
              "A Computer Science PortaL For Geeks");
            z.appendChild(text2);
            document.getElementById("GFG").appendChild(z);
        }
    </script>
</body>

</html>