Window length Property

Window Object Reference Window Object

Example

Find out how many <iframe> elements there are in the window:

var x = window.length;

The result of x could be:

3

Try it yourself »

More "Try it Yourself" examples below.


Definition and Usage

The length property returns the number of <iframe> elements in the current window.

Tip: This property is often used together with the window.frames property.

Note: This property will also work for <frame> elements. However, the <frame> element is not supported HTML5.

This property is read-only.


Browser Support

Property
length Yes Yes Yes Yes Yes

Syntax

window.length

Technical Details

Return Value: A Number, representing the number of frames in the current window

Examples

More Examples

Example

Loop through all frames on a page, and change the location of all frames to "w3schools.com":

var frames = window.frames;
var i;

for (i = 0; i < frames.length; i++) {
    frames[i].location = "http://www.w3schools.com";
}

Try it yourself »

Related Pages

HTML reference: HTML <iframe> tag


Window Object Reference Window Object

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