jQuery.isWindow()

Categories: Deprecated > Deprecated 3.3 | Utilities

jQuery.isWindow( obj )Returns: booleanversion deprecated: 3.3

Description: Determine whether the argument is a window.

Note: This API has been deprecated in jQuery 3.3; if you need this function, reimplement it by yourself:

function isWindow( obj ) { return obj != null && obj === obj.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.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery.isWindow demo</title>
  <script src="https://code.jquery.com/jquery-3.7.1.js"></script>
</head>
<body>
 
Is 'window' a window? <b></b>
 
<script>
$( "b" ).append( "" + $.isWindow( window ) );
</script>
 
</body>
</html>

Demo: