HTML DOM Window self( ) Property

Last Updated : 15 Jun, 2023

The Window self() property is used for returning the current window. It is generally used for comparison purposes while using other functions such as top().
It is a read-only property and it returns a reference to the Window object itself.
Syntax:

window.self

Return Value: Return reference of the Window object.

Below program illustrates the Window self() property:
Using Window self() property for comparison with the window top() property.

html

<!DOCTYPE> 
<html> 
  
<head> 
    <title> 
      Window self() property in HTML 
    </title> 
    <style> 
        h1 { 
            color: green; 
        } 
          
        h2 { 
            font-family: Impact; 
        } 
          
        body { 
            text-align: center; 
        } 
    </style> 
</head> 
  
<body> 
  
    <h1>GeeksforGeeks</h1> 
    <h2>Window self() 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> 