window.length

Returns the number of frames (either <frame> or <iframe> elements) in the window.

Syntax

framesCount = window.length;

• framesCount is the number of frames.

Example

if (window.length) {
  // this is a document with subframes
}

Specifications

Specification	Status	Comment
WHATWG HTML Living Standard The definition of 'Window.length' in that specification.	Living Standard
HTML5 The definition of 'Window.length' in that specification.	Recommendation