Warning: Removed in Firefox 65.

The zoom() method of the HTMLIFrameElement interface changes the zoom factor of the browser <iframe>'s content. This is particularly useful for zooming in/out on non-touch-enabled devices.

Syntax

var instanceOfDOMRequest = instanceOfHTMLIframeElement.zoom(zoomFactor);

Returns

Void.

Parameters

zoomFactor
A unitless number value representing the amount to zoom in or out. It acts like a percentage, so for example 1.1 would zoom in by 10%, whereas 0.9 would zoom out by 10%.

Examples

var browser = document.querySelector('iframe');

var zoomFactor = 1;

zoomIn.addEventListener('touchend',function() {
  zoomFactor += 0.1;
  browser.zoom(zoomFactor);
});

zoomOut.addEventListener('touchend',function() {
  zoomFactor -= 0.1;
  browser.zoom(zoomFactor);
});

Specification

Not part of any specification.

Browser compatibility

Supported since Firefox 47, in chrome code only. Removed completely in Firefox 65.

Unlikely ever to be supported in other browsers.

See also