Access child HTML widget/iframe content from Hype doc parent?

[free3moose (Markus)]

I'm going to collect my research contents here for future reference. I may not actually NEED all of these things but they all seem to be connected.

How to use postMessage for Cross-Domain Messaging [Article] | Treehouse

skinny.js

How to target Elements in a HTML Widget

You often need to access and use an element you have placed in the innerHTML of an HTML Widget for example, a video element. <video width="100%" id="myVideo" preload="auto" x-webkit-airplay="true" webkit-playsinline="true"> <source src="${resourcesFolderName}/Untitled.mp4" type="video/mp4"> </video> It may seem like you should just be able to use the normal hypeDocument Syntax to get the video element, var myVid= hypeDocument.getElementById('myVideo'); or indeed the documents synta…

Please do give me any clues or helpful tips and let me know if I'm researching the wrong thing?