Hacker News Reader

Comment by pentanide | Hacker News Reader

Hello Adham! Great solution, but I'm having an issue using my Paperwhite 7 Generation in the Kindle web browser. When I try to click on any of the already saved feed, a pop up appears showing the following: loadFeed error: 'undefined' is not an object. Maybe you have already encountered an issue like this. Thanks in advance!

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It's hard for me to debug this because I don't have a Paperwhite 7. I assume it's a JS compatibility issue but not where the exact root cause.

Since the reader is Open Source, can you run it on your machine and view it on your local network to debug and tell me what's the issue so that I can fix it?

On Kindle 7’s outdated WebKit, both feed loading and article opening failed because the code relied on Set and DOM properties(too modern) that were missing, causing “undefined is not an object/function” errors. I could fix it by adding defensive null/type checks across DOM and helper functions, and implementing a full Set polyfill (has, add, delete, clear, forEach) to ensure compatibility without changing the existing logic. Now that I'm checking, the Hacker News articles don't correctly load. Only shows the URL.

It would be great if you opened an issue on GitHub (or a PR) so we can fix this. I definitely want this to work on all Kindles including older models. Thank you.

Sorry for the delay. Will check it out.

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