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jamenamcinteer / react-qr-barcode-scanner

A simple React Component using the client's webcam to read barcodes.
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Issues with MultiFormatReaders #11

Closed mperu92 closed 3 years ago

mperu92 commented 3 years ago

Hello, i'm just trying this module and i'm having troubles when my component is rendered: onUpdate function triggers endlessly with the err input params that send this message (result param is undefined):

**NotFoundException: No MultiFormat Readers were able to detect the code.**
    at MultiFormatReader.__webpack_modules__../node_modules/@zxing/library/esm5/core/MultiFormatReader.js.MultiFormatReader.decodeInternal (https://localhost:9970/main.bundle.js:25687:15)
    at MultiFormatReader.__webpack_modules__../node_modules/@zxing/library/esm5/core/MultiFormatReader.js.MultiFormatReader.decodeWithState (https://localhost:9970/main.bundle.js:25569:21)
    at BrowserMultiFormatReader.__webpack_modules__../node_modules/@zxing/library/esm5/browser/BrowserMultiFormatReader.js.BrowserMultiFormatReader.decodeBitmap (https://localhost:9970/main.bundle.js:23953:28)
    at BrowserMultiFormatReader.__webpack_modules__../node_modules/@zxing/library/esm5/browser/BrowserCodeReader.js.BrowserCodeReader.decode (https://localhost:9970/main.bundle.js:23687:21)
    at loop (https://localhost:9970/main.bundle.js:23637:36)
    at https://localhost:9970/main.bundle.js:23651:64
    at new Promise (<anonymous>)
    at BrowserMultiFormatReader.__webpack_modules__../node_modules/@zxing/library/esm5/browser/BrowserCodeReader.js.BrowserCodeReader.decodeOnce (https://localhost:9970/main.bundle.js:23651:16)
    at HTMLImageElement._this.imageLoadedListener (https://localhost:9970/main.bundle.js:23528:68)

What could be the probem? I am forgetting to do something?

Thank you!

mperu92 commented 3 years ago

Fixed by excluding the console.log() of the err input parameter of the onUpdate function. I later understood that the function instantiates itself recursively, sorry!