A set of Vue.js components for detecting and decoding QR codes.
MIT License
A set of Vue.js components for detecting QR codes and various other barcode formats right in the browser:
QrcodeStream
continuously scans frames from a camera stream.QrcodeDropZone
is an empty region where you can drag-and-drop images to be decoded.QrcodeCapture
is a classic file upload field, instantly scanning all files you select.All components are responsive. Beyond that, close to zero styling. Make them fit your layout. Usage is simple and straight forward:
<qrcode-stream @detect="onDetect"></qrcode-stream>
methods: {
onDetect (detectedCodes) {
// ...
}
}
Run
npm install vue-qrcode-reader
You can import the components independantly
import { QrcodeStream, QrcodeDropZone, QrcodeCapture } from 'vue-qrcode-reader'
const MyComponent = {
//
components: {
QrcodeStream,
QrcodeDropZone,
QrcodeCapture
}
// ...
}
or register all of them globally right away
import Vue from 'vue'
import VueQrcodeReader from 'vue-qrcode-reader'
Vue.use(VueQrcodeReader)
Include the following JS file:
https://unpkg.com/vue-qrcode-reader/dist/vue-qrcode-reader.umd.js
Make sure to include it after Vue:
<script src="./vue.js"></script>
<script src="./vue-qrcode-reader.umd.js"></script>
All components are automatically registered globally. Use kebab-case to reference them in your templates:
<qrcode-stream></qrcode-stream>
<qrcode-drop-zone></qrcode-drop-zone>
<qrcode-capture></qrcode-capture>
QrcodeStream
.error
event to investigate errors.barcode-detector
-> zxing-wasm
-> zxing-cpp
, and file detection issues in the highest-level repository where the problem first occurs.The default value for the formats
prop is "['qr_code']"
, which reflects the setting before the formats
prop was available.
You'll need to add other barcode formats to this prop to detect those types of barcodes.
Check out this demo.
Support is dropped but you can downgrade to vue-qrcode-reader v3.* or lower.
That Wasm file implements the QR code detector. Unfortunately, it's not very convenient to bundle this file with the package. So by default we fetch it at runtime from a CDN. That's an issue for offline applications or applications that run in a network with strict CSP policy. For a workaround see: https://github.com/gruhn/vue-qrcode-reader/issues/354
torch
is not supported on my device, although it has a flashlight.Support for torch
is inconsistent across devices, cameras and browsers and operating systems.
On some devices the rear camera supports torch
but the front camera doesn't,
even if the front camera actually has a flashlight.
Furthermore, torch
is not supported on iOS at all (last checked iOS 17.1).
Visit this page with your device.
The list of links represents all cameras installed on the device.
If you click, the camera should be loaded.
Below the camera view the JSON object of "capabilities" is printed.
If it doesn't contain the key/value pair "torch": true
then flashlight is not supported for that camera.
This JSON object provided as payload of the camera-on
event.