Its a Custom Web Component. Do not use the constructor directly with the new keyword. Instead, use one of the 3 following methods:

Create the Web Component and call its init method:

const myQrCode = document.createElement("a-qrcode").init(config)

Or use the shorthand for it:

const myQrCode = createQrCode({
 text: "I'm a QRCode"
})

myQrCode.render()

Or directly declare the config inside a container component:

const myPanel = createPanel({
  title: "My panel",
  items: [
      {
         type: "qrcode",
         text: "I'm a QRCode",
         colorDark: "#00aaee",
         correctionLevel: "H"
      }
  ]
})
myPanel.render()