Returns the number of frames (either <frame> or <iframe> elements) in the window.
Syntax
framesCount = window.length;
framesCountis the number of frames.
Example
if (window.length) {
// this is a document with subframes
}
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'Window.length' in that specification. |
Living Standard | |
| HTML5 The definition of 'Window.length' in that specification. |
Recommendation |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
length | Chrome Full support Yes | Edge Full support 12 | Firefox Full support Yes | IE ? | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown