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.