Generating QR Codes in a Web Application Using a JavaScript Library

Quick Response (QR) codes are a type of matrix code. These machine-readable codes contain information that cannot be changed once generated.

Difference Between Barcodes and QR Codes

The main difference between barcodes and QR codes lies in their physical dimensions. Barcodes are scanned in a single line, while QR codes add another dimension, allowing them to be read both vertically and horizontally.

Generating QR Codes in a Web Application

In this article, we will learn how to generate QR codes in a web application using a JavaScript (JS) library.

Steps to Integrate QR Code Generation

Download the JS Library: The JS library for generating QR codes is available on the web. You can download it from the provided link.
Copy the JS File: Once downloaded, copy the JS file into your web application’s JS folder.
Import the JS Library: Import the JS library into your web page using the `<script>` tag.
Add a Div Container: Add a `<div>` container in your HTML to display the QR code.
Create the `getQR` Function: Write a JavaScript function that takes any input and converts it into a QR code. Set the height and width as per your requirements.

Sample Code

Here is a sample code snippet to help you get started:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>QR Code Generator</title>
    <script src="path/to/your/qr-library.js"></script>
</head>
<body>
    <div id="qrcode"></div>
    <script>
        function getQR(text) {
            var qrcode = new QRCode(document.getElementById("qrcode"), {
                text: text,
                width: 128,
                height: 128
            });
        }
        getQR("Your text here");
    </script>
</body>
</html>

Working Example

You can find a working example of this code on [JSFiddle](https://jsfiddle.net/). I hope this guide helps you integrate QR code generation into your web application!

Submitted By Vibhuti Singh
Category jquery
Created On 22-Aug-2024

Generate QR Code using Javascript or JQuery