HTML DOM Window innerWidth Property

Last Updated : 15 Jun, 2023

The Window innerWidth property is used for returning the width of a window’s content area. It is a read-only property and returns a number which represents the width of the browser window’s content area in pixels.

Syntax:

window.innerWidth

Return Value: It returns a number that represents the browser window’s content area width in pixels.

Below program illustrates the Window innerWidth Property :
Returning the current frame’s width.

html

<!DOCTYPE html> 
<html> 
<head> 
    <title> 
      Window innerWidth Property in HTML 
    </title> 
    <style> 
        h1 { 
            color: green; 
        } 
          
        h2 { 
            font-family: Impact; 
        } 
          
        body { 
            text-align: center; 
        } 
    </style> 
</head> 
<body> 
  
    <h1>GeeksforGeeks</h1> 
    <h2>Window innerWidth Property</h2> 
      
<p> 
      For returning the current frame's width,  
      double click the "Check Width" button:  
    </p> 
  
    <button ondblclick="width()">Check Width</button> 
    <p id="measure"></p> 
  
    <script> 
        function width() { 
            var w = window.innerWidth; 
            document.getElementById("measure").innerHTML = 
                                     "Frame's Width: " + w; 
        } 
    </script> 
</body> 
</html>