[bob1029]

https://github.com/zxing-js/library

Media constraints are the #1 reason it won't scan in my experience. You need at least ~1000px horizontal to reliably decode PDF417. If the resolution is 720p or lower, you aren't capturing enough information for a decode.

[k__]

I tried zxing too.

Scanning 2D barcodes only works reliable on smartphones with good camera and with good lighting.

I needed it for a ticket scanner used on an old phone at night entries for concerts.

Went and bought a hardware scanner (for 30€ or something) that connects itself as a "Bluetooth keyboard". Works like a charm.

[bob1029]

> Scanning 2D barcodes only works reliable on smartphones

We wont even fully certify iPhones for use with this solution because we have seen consistent failure to autofocus on the barcode for "some weird reason". iPads work like magic though. I have to go out of my way to not get a quick scan on recent generation iPad camera.

We went down the hardware scanning path w/ keyboard emulation in the browser, but its kind of clunky when you are considering the overall solution stack in a B2B setting.

[ubercore]

We've also not had the best luck with keyboard emulation scanners, but unless you want to add a native wrapper, there aren't a ton of good options.

[k__]

Oh how come?