HTMLIFrameElement.addNextPaintListener()

Warning: Removed in Firefox 65.

The addNextPaintListener() method of the HTMLIFrameElement is used to define a handler to listen for the next MozAfterPaint event coming from the browser <iframe>.

This event provides information about what has been repainted. It is mainly used to investigate performance optimization.

Note: The handler will receive the event once and then be thrown away.

Syntax

instanceOfHTMLIframeElement.addNextPaintListener(listener);

Returns

Void.

Parameters

listener: A function handler to listen for a MozAfterPaint event.

Examples

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

function onNextPaint() {
  console.log("Paint has occured");
}

browser.addNextPaintListener(onNextPaint);

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.