W3cubDocs

/Web APIs

Window: length property

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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
length 1 12 1 4 ≤12.1 1 4.4 18 4 ≤12.1 1 1.0

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https://developer.mozilla.org/en-US/docs/Web/API/Window/length