Error using Uint8Array: input.charCodeAt is not a function

[rhengles]

When using a Uint8Array object to create my qrcode:

let data = [{ data: new Uint8Array([1,2,3,4,/*example*/5,6]), mode: 'byte' }]
QRCode.toCanvas(myCanvas, data, myOptions, function (error) {
	if (error) console.error(error);
	else console.log('QRCode drawn');
});

The library fails with the error below.

TypeError: input.charCodeAt is not a function
    at encodeUtf8 (qrcode.js:1417:25)
    at new ByteData (qrcode.js:1469:12)
    at buildSingleSegment (qrcode.js:1967:18)
    at qrcode.js:1992:20
    at Array.reduce (<anonymous>)
    at Object.fromArray (qrcode.js:1988:20)
    at createSymbol (qrcode.js:2393:29)
    at Object.create (qrcode.js:2493:12)
    at renderCanvas (qrcode.js:2708:25)
    at Proxy.fnRenderCode (qrcode.js:37:11)

I traced the error to the function below

// path: /lib/core/byte-data.js
function ByteData (data) {
  this.mode = Mode.BYTE
  this.data = new Uint8Array(encodeUtf8(data)) // <-- error here
}

When I change it according to the code below, it works:

// path: /lib/core/byte-data.js
function ByteData (data) {
  this.mode = Mode.BYTE
  if ('string' === typeof data) data = encodeUtf8(data)
  this.data = new Uint8Array(data)
}

[irvandikky]

In Node "Buffer instances are also Uint8Array instances", so data.toString() works in this case.

[air2]

Based on your finding I came to this (ugly) typescript work-around, because modifying the lib in an existing project is of course a little bit problematic :

qr.segments.forEach(segment => {
  if (typeof segment.data !== 'string') {
    segment.data = decodeUtf8(segment.data)
  }
})