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

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
length