Creating a QR Code Generator using JavaScript

Scan Qr code: 

App Preview : Creating a QR Code Generator using JavaScript

Text to encode:

In today's digital age, QR codes have become an essential part of our daily lives. They are used to store information, such as website URLs, contact information, and even product details. These codes can be scanned using a smartphone or a QR code reader, making it easy to access the information stored within them.

Creating a QR code is a simple process, and with the help of a few lines of code, you can generate one in no time. In this blog post, we will show you how to create a QR code generator using JavaScript.

The first step is to include the QR code library, which can be done by adding the following line of code in the head of your HTML file:

<script src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>

Next, create a form where the user can enter the text they want to encode. In this example, we have used a simple input field and a button to trigger the QR code generation.

<form> 

 <label for="text">Text to encode:</label> 

 <input type="text" id="text" name="text"> 

 <button type="button" onclick="generateQR()">Generate QR Code</button> 

</form>


Now, create a div element with an id "qrcode" where the QR code will be displayed.

<div id="qrcode"></div>

Finally, add the following JavaScript code to generate the QR code when the button is clicked. The code creates a new QRCode object, passing in the div element, the text to be encoded, and some additional options such as the width, height, and color of the QR code.

function generateQR() 

{ var text = document.getElementById("text").value; 

 var qrcode = new QRCode(document.getElementById("qrcode"), { text: text, width: 200, height: 200, colorDark : "#000000", colorLight : "#ffffff", correctLevel : QRCode.CorrectLevel.H }); }


With these simple steps, you can create your own QR code generator using JavaScript. It can be easily embedded in a website, making it easy for users to generate QR codes on the fly.

Note: the code you provided is a complete HTML file, so if you want to use it as a standalone page, you can save it with a .html extension and open it with a browser.