documentation for iframe post messages

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Hakim El Hattab 2013-10-27 16:39:20 -04:00
parent 9dfaf8815a
commit 3ad4320f61

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@ -493,6 +493,8 @@ Add `data-autoplay` to your media element if you want it to automatically start
<video data-autoplay src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"></video>
```
Additionally the framework automatically pushes two [post messages](https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage) to all iframes, ```slide:start``` when the slide containing the iframe is made visible and ```slide:stop``` when it is hidden.
### Stretching elements
Sometimes it's desirable to have an element, like an image or video, stretch to consume as much space as possible within a given slide. This can be done by adding the ```.stretch``` class to an element as seen below: