Window: length property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Returns the number of frames (either <frame> or
<iframe> elements) in the window.
Value
A number.
Examples
js
if (window.length) {
// this is a document with subframes
}
Specifications
| Specification |
|---|
| HTML> # dom-length-dev> |