New comment by ben_w in "Remember QR Codes? They’re More Powerful Than You Think"

Because it says “powerful” rather than “useful”, I was expecting this to be about surprising data types rather than business cases.

For example, you can make a data URL containing JavaScript and turn that into a QR code:

https://kitsunesoftware.wordpress.com/2017/04/10/executable-...

Some QR code readers execute that JavaScript. (Not all, fortunately).

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