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HTML DOM Window innerWidth Property

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 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.



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. 


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


After clicking the button: 

Supported Browsers: The browser supported by Window innerWidth Property are listed below:  

  • Google Chrome 1
  • Edge 12
  • Internet Explorer 9
  • Firefox 1
  • Opera 9
  • Safari 3

Last Updated : 15 Jun, 2023
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