HTMLIFrameElement: allowFullscreen property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The allowFullscreen property of the HTMLIFrameElement interface is a boolean value that reflects the allowfullscreen attribute of the <iframe> element, indicating whether to allow the iframe's contents to use requestFullscreen().

Note: This property is considered a legacy property. Use allow="fullscreen" and HTMLIFrameElement.allow instead.

Value

A boolean value.

Examples

html

js
const el = document.getElementById("el");
console.log(el.allowFullscreen); // Output: true

Specifications

Specification

HTML
# dom-iframe-allowfullscreen

Browser compatibility

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This page was last modified on Mar 13, 2025 by MDN contributors.

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