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Q:

qr reader react js

import React, { Component } from 'react'import QrReader from 'react-qr-reader' class Test extends Component {  state = {    result: 'No result'  }   handleScan = data => {    if (data) {      this.setState({        result: data      })    }  }  handleError = err => {    console.error(err)  }  render() {    return (      <div>        <QrReader          delay={300}          onError={this.handleError}          onScan={this.handleScan}          style={{ width: '100%' }}        />        <p>{this.state.result}</p>      </div>    )  }} 
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