WebViewer does not load in macOS Safari when embedding via iframe

[sbi]

Hi guys,

with the latest release of WebViewer we found that it is no longer possible to embed the viewer via iframe into a page of different origin in Safari.

It seems that this only affects the Safari browser, we did not see other browsers behaving this way in our tests.

For demonstration purposes i prepared a simple CodePen snipped that embeds the WebViewer Showcase in an iframe.

It loads perfectly fine in Chrome but fails to load in Safari:

https://codepen.io/anon/pen/JJpjRM

Following errors are thrown:

SecurityError (DOM Exception 18): IDBFactory.open() called in an invalid security context
ReferenceError: Can't find variable: Modernizr

 We actually need this iframe around the viewer as it is currently the only way to load the viewer in a page of different origin as discussed here:

https://groups.google.com/forum/#!topic/pdfnet-webviewer/O4ryfTAxPh4

Could you please look into this issue? Thanks.

[Justin Jung]

Hello,

We've updated Modernizr in WebViewer 3.0 and it seems like there is a problem with it in this particular case in Safari.

We made a small fix to Modernizr to work around this problem, you can replace modernizr.custom.js in lib/html5/external with the attached file.

We'll include this in a future release.

Justin Jung

Software Developer

PDFTron Systems Inc.