# QR Code generator using Node.js

QR codes have become an integral part of our digital lives from sharing links to contactless payments. Have you ever wondered how you can create a QR code generator using nodejs? Here we will walk you through explaining its purpose and functionality. By the end of this blog, you will have a solid understanding of how to build a QR code generator from scratch with not much knowledge of node js and npm.

### Prerequisites

Before we begin make sure to have the following prerequisite :

* Node.js: If you haven't already downloaded it, install it from [here](https://nodejs.org/en).
    
    That's all for now.
    

### Code Overview

```javascript
import inquirer from 'inquirer'
import qr from 'qr-image';
import fs from 'fs';

inquirer
  .prompt([
    {
        message:'Enter the URL:',
        name:"URL",
    },
  ])
  .then((answers) => {
    const url = answers.URL;
    let qr_svg = qr.image(url);
    qr_svg.pipe(fs.createWriteStream('qr_image2.png'));
    fs.writeFile('url2.txt', 'URL is of Wikipedia!!!', (err) => {
    if (err) throw err;
    console.log('The file has been saved!');
    }); 
  })
  .catch((error) => {
    if (error.isTtyError) {
      // Prompt couldn't be rendered in the current environment
    } else {
      // Something else went wrong
    }
  });
```

### Gathering User Input

We start by importing three crucial Node.js packages :

* \`inquirer\` is used to prompt the user for input.
    
* \`qr-image\` allows us to generate QR code images.
    
* \`fs\` is for working with the file system.
    

### Generating the QR Code

Next, we generate the QR code image. We use `qr.image(url)` from the package, passing in the user's URL. This creates a QR Code image in memory.

To save the image, we pipe it to a writable stream created with `fs.createWriteStream('qr_image2.png')` saving it as a 'qr-image2.png' in the current directory.

### Saving User Input

We use the built-in 'fs' module to create a text file named 'url2.txt' and save the text "URL is of Wikipedia" to it.

### Error Handling

Code includes error handling in the form of a '.catch( )' block. It checks for potential errors like issues rendering prompts in the current environment etc.

### Conclusion

It is just the overview of the project, you have to read the documentation yourself from nodejs and npm websites. Also, you can expand upon this code to create a more versatile QR code generator and enhance your error handling. Hope it helped you, do like and share with your friends.