## jQuery.isWindow( obj )Returns: boolean version deprecated: 3.3

Description: Determine whether the argument is a window.

- #### version added: 1.4.3 jQuery.isWindow( obj )

  - obj
    Type: PlainObject
    Object to test whether or not it is a window.

This is used in a number of places in jQuery to determine if we're operating against a browser window (such as the current window or an iframe).

## Example:

Finds out if the parameter is a window.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
    <!doctype html><html lang="en"><head>  <meta charset="utf-8">  <title>jQuery.isWindow demo</title>  <script src="https://code.jquery.com/jquery-1.10.2.js"></script></head><body> Is 'window' a window? <b></b> <script>$( "b" ).append( "" + $.isWindow( window ) );</script> </body></html>

#### Demo: