HTML | Window top( ) Property

The Window top() property is used to return the topmost browser window of a current window. It is a read-only property and it returns a reference to the topmost window in the window hierarchy.

Syntax:

window.top

Below program illustrates the Window top() property :

Checking whether the window is the topmost browser window or not.

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<!DOCTYPE>
<html>
  
<head>
    <title>Window top() property in HTML</title>
    <style>
        h1 {
            color: green;
        }
          
        h2 {
            font-family: Impact;
        }
          
        body {
            text-align: center;
        }
    </style>
</head>
  
<body>
  
    <h1>GeeksforGeeks</h1>
    <h2>Window top() Property</h2>
  
    <p>For checking whether the window is the topmost window or not,
      double click the "Check Top Window" button: </p>
  
    <button ondblclick="Window()">Check Top Window</button>
  
    <p id="MyWindow"></p>
  
    <script>
        function Window() {
            if (window.top = window.self) {
                document.getElementById("MyWindow").innerHTML = 
                  "This window is the topmost window.";
            } else {
                document.getElementById("demo").innerHTML = 
                  "This window is not the topmost window.";
            }
        }
    </script>
</body>
  
</html>
                              

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Output:

After clicking the button

Supported Web Browsers

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


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I am a technology enthusiast who has a keen interest in programming I am pursuing Engineering in Computer Science from GEU, Dehradun I like to unwind by watching movies and English sitcomsI have a keen interest in music

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