Bug 134446 – Media elements should not trigger events for control interactions

• Status: NEW
• Component: Media

[Chris Adams]

According to the HTML specification, native controls on the media element should not trigger normal mouse
events:

“If the user agent exposes a user interface to the user by displaying controls over the media element, then
the user agent should suppress any user interaction events while the user agent is interacting with this
interface. (For example, if the user clicks on a video's playback control, mousedown events and so forth
would not simultaneously be fired at elements on the page.)”

http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#attr-media-controls

The WebKit nightlies do not follow this behaviour:

1. Open http://www.quirksmode.org/html5/tests/video.html

2. Run the following JavaScript in the console:

Array.prototype.forEach.call(document.querySelectorAll('video'), function (i) {
    i.addEventListener('mousedown', function (evt) { console.log('video', evt.type) });
    i.addEventListener('mouseup', function (evt) { console.log('video', evt.type) });
    i.addEventListener('click', function (evt) { console.log('video', evt.type) });
    i.parentNode.addEventListener('mousedown', function (evt) { console.log('parent', evt.type) });
    i.parentNode.addEventListener('mouseup', function (evt) { console.log('parent', evt.type) });
    i.parentNode.addEventListener('click', function (evt) { console.log('parent', evt.type) });
})

3. Click on the play/pause button on a <video> element with native controls

Note that the mousedown/mouseup/click events all fire and there is no way to tell whether the event was 
triggered by a click on the video itself or on a control.