How to Make a QR Code Generator Using HTML and JavaScript

Are you looking for a way to generate QR codes dynamically using HTML and JavaScript? Look no further! In this tutorial, we’ll show you how to create a simple QR code generator that can be used to generate QR codes for various purposes, including dynamic codes, tracking, analytics, free text, vCards, and more.

What You’ll Need

To get started, you’ll need a basic understanding of HTML, CSS, and JavaScript. You’ll also need a code editor or IDE to write and test your code.

Step 1: Setting Up the HTML Structure

First, let’s create the HTML structure for our QR code generator. We’ll need an input field where users can enter the text they want to convert to a QR code, a button to generate the QR code, and a div element to display the generated QR code.

 

<!– HTML code –>
<input class=”user-input” id=”myinput” type=”text” onchange=”refreshqr()” placeholder=”Enter Your QR Here”>
<p class=’note’>Supports Dynamic Codes, Tracking, Analytics, Free text, vCards and more.</p>
<button class=”button” onclick=”refreshqr()”>Generate QR Code</button>
<br><br>
<div align=”center” id=”yourid”></div>

 

Step 2: Adding JavaScript Functionality

Next, let’s add the JavaScript code that will generate the QR code. We’ll use the QRCode.js library, which is a popular JavaScript library for generating QR codes.

 

<script src=”https://cdn.jsdelivr.net/gh/davidshimjs/qrcodejs@master/qrcode.js”></script>

<script type=”text/javascript”>
var qrcode = new QRCode(document.getElementById(“yourid”), {
text: ‘MyText’,
width: 350,
height: 350,
colorDark: “#000”,
colorLight: “#fff”,
correctLevel: QRCode.CorrectLevel.H
});

function refreshqr() {
qrcode.makeCode(document.getElementById(‘myinput’).value); // make another code.
}
</script>

 

Step 3: Testing and Customization

Once you’ve added the HTML and JavaScript code to your project, you can test the QR code generator by entering text into the input field and clicking the “Generate QR Code” button. Feel free to customize the design and functionality to match your preferences and branding.

 

How it Works

Here’s how the code works:

1. The user enters the text they want to convert to a QR code in the input field.
2. When the user clicks the “Generate QR Code” button, the refreshqr() function is called.
3. The refreshqr() function uses the QRCode.js library to generate a QR code based on the text entered by the user.
4. The generated QR code is displayed in the div element with the id “yourid“.

 

Conclusion

That’s it! With this simple tutorial, you’ve learned how to create a QR code generator using HTML and JavaScript. You can use this code to generate QR codes for various purposes, including dynamic codes, tracking, analytics, free text, vCards, and more.