QR Code Reader / Scanner in React (Html5-QRCode.js)

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This tutorial shows you how to implement a QR code reader / scanner in React using the Html5-QRCode library.
#react #qrcode #tutorial #reacttutorial#reactjs #reactjstutorial

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[ismytv]

Hi, I tried it with Nextjs 15 and it worked. Awesome!

[mr.RAND]

Very useful. We need to make an inventory using a barcode. Thank you for your free tutorial.

[web-jl]

but for my laptop it is not opening the camera why?? i have did what you told but it is not working

[EvenceMohauLanga-md]

import React, { useEffect, useState } from 'react';
import { Html5QrcodeScanner } from 'html5-qrcode';
import './App.css';

function App() {
const [scanResult, setScanResult] = useState(null);
const [manualSerialNumber, setManualSerialNumber] = useState('');

useEffect(() => {
const scanner = new Html5QrcodeScanner('reader', {
qrbox: {
width: 250,
height: 250,
},
fps: 5,
});

let isScanning = true;

scanner.render(success, error);

function success(result) {
if (isScanning) {
scanner.clear();
setScanResult(result);
isScanning = false; // Set isScanning to false to stop further scanning
}
}

function error(err) {
console.warn(err);
}
}, []);

function {

}

return (
<div className="App">
<h1>QR Scanning Code</h1>
{scanResult ? (
<div>
<p>Success: <a
<p>Serial Number: {scanResult.slice(-16)}</p>
</div>
) : (
<div>
<div id="reader"></div>
<p className="center-text">Or enter the serial number manually:</p>
<div className="center-input">
<input
type="text"
value={manualSerialNumber}

/>
{manualSerialNumber && (
<p>Serial Number:
)}
</div>
</div>
)}
</div>
);
}

export default App;

Hi...this code doesn't scan using a live camera but only when i upload the might be the problem?

[parkj]

hello. Thanks for the good solution.
Is it possible to communicate with the server by binding data to QR code?
Is it possible to scan the QR code and display a modal window rather than a results page?

I've been thinking about solving this problem for several days.

[juryhc]

Very good video tutorial, I have a question:
is it possible to modify the interface and labels of the qr reader?

[cosmasdaniella]

This is a cool tutorial but for some reason I keep gettign this error "Uncaught HTML Element with id=reader not found".

[ila]

Good tutorial.I am loading this in webview for android app.But the cam is not opened for QR code.It triggers error.Also the qr code image path is not loaded.
Any idea?

[teclyt_solutions]

very good tutorial helped me alot, thankyou

[MiyaIzumi-qn]

Is there any way to upload image as an identification card with a qr-code in it and scan it ? I tried it right now it doesn't recognize the qr-code in it

[yashpataliya]

thanks for the code
but i want when i click on the turnon button then only camera start not before

[TanaTorn-nj]

How to fix :Uncaught TypeError: Cannot read properties of null (reading 'videoWidth')

[nanaana]

Hi, is it possible to use an external camera? Like cam scanner, web cam or something else

[lifeofstephen-yt]

Why do you sound like you are being kidnapped lol

[Kratosgod]

Hello! am i the only one who gets 23 warnings like this one:
WARNING in
Module Warning (from
Failed to parse source map from file: Error: ENOENT: no such file or directory, open

????

Thanks for the video! ill keep trying to make it work

[sriharibolisetti]

HTML Element with id=reader not found
i'm getting this error

[evobbvz]

console.log(scanResult) in useEffect no value