Readium reader not loading in IE 11 when reader is inside an another iframe

[prinjumonkm]

General Instructions

• When we are putting readium reader inside an iframe, the content is not loading in IE. But its loading fine in Chrome, Mozilla, Edge & Safari.

• We have created an epub reader by using readium, and it is working fine in all browsers including IE. We have a use case to load this reader inside an iframe and once we try to load this in IE, content is not loading.

• For testing purpose, i put readium online reader path(https://readium.org/readium-js-viewer/?epub=https%3A%2F%2Freadium.org%2Freadium-js-viewer%2Fepub_content%2FepubReadingSystem%2FepubReadingSystem.epub&) inside the iframe and tested in all browsers. The same result happend (the content doesnt load in IE). When i checked the console, there is an error saying "access is denied"

This issue is a Question

Expected Behaviour

• The reader should load in IE 11

Observed behaviour

*Instead, it is not loading when we put readium reader inside an another iframe

Steps to reproduce

1. create one HTML file with an iframe element
2. Then put src orf iframe as readium reader(https://readium.org/readium-js-viewer/?epub=https%3A%2F%2Freadium.org%2Freadium-js-viewer%2Fepub_content%2FepubReadingSystem%2FepubReadingSystem.epub&)
3. try to load in IE 11

sample code

<title>Document</title> <iframe style="height: 900px; width: 100%" src="https://readium.org/readium-js-viewer/?epub=https%3A%2F%2Freadium.org%2Freadium-js-viewer%2Fepub_content%2FepubReadingSystem%2FepubReadingSystem.epub&" frameborder="0"></iframe>