Abhishek Gurjar

Posted on Aug 22

Build a QR Code Generator Website

#html #css #javascript #qrcodegenerator

Introduction

Hello, fellow developers! I'm excited to present my latest project: a QR Code Generator. This project is a great way to dive into JavaScript, focusing on how to dynamically generate QR codes based on user input. Whether you're new to web development or looking to enhance your JavaScript skills, this QR Code Generator project is an excellent opportunity to learn and create something useful.

Project Overview

The QR Code Generator is a web-based application that allows users to generate QR codes from any text input. This project demonstrates how to create a simple and interactive user interface, integrate third-party APIs, and handle user inputs effectively.

Features

User-Friendly Interface: Simple and clean design that makes it easy to generate QR codes.
Dynamic QR Code Generation: Instantly generates a QR code based on the text input provided by the user.
Responsive Design: Ensures a consistent experience across various devices and screen sizes.

Technologies Used

HTML: Structures the web page and input elements.
CSS: Styles the user interface, ensuring a clean and responsive design.
JavaScript: Manages the logic for generating QR codes and handling user interactions.

Project Structure

Here's a quick look at the project structure:

QR-Code-Generator/
├── index.html
├── style.css
└── script.js

index.html: Contains the HTML structure for the QR Code Generator.
style.css: Includes CSS styles to enhance the appearance and responsiveness of the application.
script.js: Manages the QR code generation logic and user interactions.

Installation

To get started with the project, follow these steps:

Clone the repository:

git clone https://github.com/abhishekgurjar-in/QR-Code-Generator.git

Open the project directory:
```
cd QR-Code-Generator
```
Run the project:
- Open the index.html file in a web browser to start using the QR Code Generator.

Usage

Open the website in a web browser.
Enter text in the input field to generate a QR code.
Click the "Generate QR Code" button to see the QR code generated based on the entered text.
Scan the QR code with any QR code reader to view the encoded text.

Code Explanation

HTML

The index.html file provides the basic structure of the QR Code Generator, including the input field and buttons for generating the QR code. Here’s a snippet:

<!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>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js" defer></script>
  </head>
  <body>
    <div class="container">
      <div class="box">
        <section class="upper">
          <h1>QR Code Generator</h1>
          <p>Paste text to create QR Code</p>
        </section>

        <form id="qrForm">
          <input
            id="qrInputText"
            type="text"
            name="qrText"
            placeholder="Enter Text"
          />
          <button id="generateBtn" type="submit">Generate QR Code</button>
        </form>
        <section id="qrContainer" class="qr_container">
          <img id="qrImage" src="./qr.webp" alt="QR Code" />
        </section>
      </div>
    </div>
    <div class="footer">
      <p>Made with ❤️ by Abhishek Gurjar</p>
    </div>
  </body>
</html>

CSS

The style.css file styles the QR Code Generator, providing a modern and user-friendly layout. Here are some key styles:

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400;500;600;700&display=swap");

:root {
  --primary: #47185c;
  --primary-dark: #14001d;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-family: "Poppins", sans-serif;
}

body {
  background-color: var(--primary);
}

.container {
  display: grid;
  place-items: center;
  height: 80vh;
}

.box {
  padding: 20px;
  width: 400px;
  background-color: white;
}

.upper h1 {
  font-size: 32px;
  font-weight: 400;
  line-height: 32px;
}

form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

form input {
  width: 100%;
  height: 40px;
  padding: 10px 15px;
}

form button {
  width: 100%;
  height: 40px;
  padding: 10px 15px;
  background-color: var(--primary);
  border: none;
  color: white;
  opacity: 0.9;
  transition: 0.3s ease-in;
}

.qr_container {
  border: 1px solid var(--primary);
  display: flex;
  justify-content: center;
  height: 0;
  opacity: 0;
  transition: opacity 0.3s ease-in, height 0.1s ease;
}

.qr_container.show {
  padding: 10px;
  height: 150px;
  opacity: 1;
}

.qr_container img {
  height: 100%;
}

.footer {
  color: white;
  margin: 50px;
  text-align: center;
}

JavaScript

The script.js file manages the logic for generating the QR codes and handling user interactions. Here’s a snippet:

const qrFormEl = document.getElementById("qrForm");
const qrImageEl = document.getElementById("qrImage");
const qrContainerEl = document.getElementById("qrContainer");
const qrInputTextEl = document.getElementById("qrInputText");
const generateBtnEl = document.getElementById("generateBtn");

const renderQRCode = (url) => {
  if (!url) return;
  generateBtnEl.innerText = "Generating QR Code...";
  qrImageEl.src = url;

  qrImageEl.addEventListener("load", () => {
    qrContainerEl.classList.add("show");
    generateBtnEl.innerText = "Generate QR Code";
  });
};

qrFormEl.addEventListener("submit", (event) => {
  event.preventDefault();

  const formData = new FormData(qrFormEl);
  const text = formData.get("qrText");
  const qrCodeUrl = `https://api.qrserver.com/v1/create-qr-code/?size=150x150&data=${text}`;

  renderQRCode(qrCodeUrl);
});

qrInputTextEl.addEventListener("keyup", () => {
  if (!qrInputTextEl.value.trim()) {
    qrContainerEl.classList.remove("show");
  }
});

Live Demo

You can check out the live demo of the QR Code Generator here.

Conclusion

Building this QR Code Generator was a fun and educational experience that helped me better understand JavaScript and how to work with APIs to create dynamic web applications. I hope this project inspires you to build something cool with JavaScript too. Happy coding!

Credits

This project was developed as part of my journey to enhance my web development skills, focusing on JavaScript and user interaction.

Author

Abhishek Gurjar
- GitHub Profile

DEV Community