[](https://badge.fury.io/js/react-qr-scanner)

legacyMode to support these platforms.facingMode will not affect it.npm install --save react-qr-scanner``js
import React, { Component } from 'react'
import QrReader from 'react-qr-scanner'
class Test extends Component {
constructor(props){
super(props)
this.state = {
delay: 100,
result: 'No result',
}
this.handleScan = this.handleScan.bind(this)
}
handleScan(data){
this.setState({
result: data,
})
}
handleError(err){
console.error(err)
}
render(){
const previewStyle = {
height: 240,
width: 320,
}
return(
{this.state.result}
Props
onScan
Type:
function, Required, Argument: resultScan event handler. Called every scan with the decoded value or
null if no QR code was found.onError
Type:
function, Required, Argument: errorFunction to call when an error occurs such as:
- Not supported platform
- The lack of available devices
onLoad
Type:
function, OptionalCalled when the component is ready for use.
onImageLoad
Type:
function, Optional, Argument: React img onLoad eventCalled when the image in legacyMode is loaded.
delay
Type:
number, Optional, Default: 500The delay between scans in milliseconds. To disable the interval pass in
false.facingMode
Type:
string, OptionalSpecify which camera direction should be used (if available). Options:
front and rear.legacyMode
Type:
boolean, Optional, Default: false.If the device does not allow camera access (e.g. IOS Browsers, Safari) you can enable legacyMode to allow the user to take a picture (On a mobile device) or use an existing one. To trigger the image dialog just call the method
openImageDialog from the parent component. Warning You must call the method from a user action (eg. click event on some element).maxImageSize
Type:
number, Optional, Default: 1500.If
legacyMode is active then the image will be downscaled to the given value while keepings its aspect ratio. Allowing larger images will increase the accuracy but it will also slow down the processing time.style
Type:
object, OptionalStyling for the preview element. This will be a
video or an img when legacymode is true. Warning The preview will keep its aspect ratio, to disable this set the CSS property objectFit to fill.className
Type:
string, OptionalClassName for the container element.
chooseDeviceId
Type:
function, Optional, Arguments: (1) video devices matching facingMode, (2) all video devicesCalled when choosing which device to use for scanning. By default chooses the first video device matching
facingMode, if no devices match the first video device found is choosen.initialStream
Type:
MediaStream, OptionalExisting MediaStream to use initially.
Dev
$3
npm install$3
npm run build$3
npm run storybook$3
npm test$3
npm run lint`Copyright (c) 2017 Thomas Billiet
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.