Yes, this announcement had me momentarily very excited until I realized that this is a proprietary offshoot and not a feature that had been added to PDF.js itself.
Their website and marketing of this fact (is it a fact?) is very confusing or misleading. The comparison at https://pdfjs.express/pdfjs-vs-express says "PDF.js is an open-source PDF library that was created by Mozilla in 2011 to let you open and render PDFs in web browsers using JavaScript. PDF.js Express is a fully-featured commercial PDF.js viewer with a modern and customizable UI."
I would really like to know whether or not "PDF.js Express" is open source. Why? Because I've done a lot of work on react + pdf.js already (for a latex editor), and it's been high on my todo list to add annotation features. So PDF.js express significantly overlaps with something I'm very seriously planning to do...
Evidently I should clarify that by "open source", I mean "released under an OSI approved license" (https://opensource.org/licenses). Maybe robocop2018 means "open source" in the sense of "there is possibly minified non-human readable source code that you can look at under a very restrictive non-OSI license"?
Thank you for your feedback and question. My apologies if it’s unclear. The source code for the UI is available on GitHub [1], but is minified in the download package for efficiency. Note that even though the code is "open source" in that repo, we still have a custom license [2].
[1] https://github.com/PDFTron/webviewer-ui
[2] https://github.com/PDFTron/webviewer-ui/blob/6.2/LICENSE
The license reads "WebViewer React UI project/codebase or any derived works is only permitted in solutions with an active commercial PDFTron WebViewer license. For exact licensing terms please refer to your commercial WebViewer license. For use in other scenario, please contact sales@pdftron.com".
That is a proprietary source-available license, very much not open source at all.
Please don't use the term open source, not even in quotes, if your code is not available under a license that meets the Open Source Definition or the Free Software Definition.
So which is it? robocop2018 is claiming it's AGPL/commercial dual-licensed, but you say it just has the custom license and that's the only license in the repo?
What license is this under? Where can I get the source code?
The website says it is open source in one place, and then in other places it says it is a "commercial PDF web viewer that wraps around the PDF.js open-source rendering engine."
I didn't see any link to the source code or license anywhere on the site?
There is no mention of AGPL anywhere in that repository. There is just a LICENSE file with a completely different proprietary license: it is not open source at present. If you intend to make it open source, you need to change the license to an open source one.
