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 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 4 | Opera Full support ≤12.1 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support ≤12.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support