Non-standard
This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
This API is available on Firefox OS for privileged or certified applications only.
Summary
The getVisible method is used to request the current visible state of the browser <iframe>.
Syntax
instanceOfDOMRequest = instanceOfHTMLIframeElement.getVisible();
Return
Returns a DOMRequest object to handles the request's success and error. If the request is succesful, the request's result is a boolean indicating the visible state of the browser <iframe>.
Example
var browser = document.querySelector("iframe[mozbrowser]");
var request = browser.getVisible();
request.onsuccess = function () {
console.log("The visible state is: " + this.result ? "true" : "false");
}
Specification
Not part of any specification.