Readme and screenshots added

Author: sagar-io

README.md

@@ -0,0 +1,33 @@
+# QR Code Generator
+
+## Overview
+ This QR Code Generator Web App is very useful. You can convert your information
+ to the form of qr code and you can also download generated qr in your local device.
+
+<br/>
+### Screenshots
+![](./screenshots/qr-code-screenshot.png)
+<br/><br/>
+
+
+### Links
+
+- Live Site URL: [See Website](https://qr-cod.netlify.app/)
+
+## My process
+
+### Built with
+
+- HTML5 
+- CSS 
+- Flexbox
+- API
+- File Saver functions
+
+### What I learned
+- How to work with API.
+- How to save qr code file in local device
+
+## Author
+
+- Website - [Sagar Sharma](https://sagar-io.github.io/)

app.js

@@ -6,7 +6,10 @@ let userText = 'Hello, World !';
 let link;
 
 function handleQR() {
-    userText = this.value;
+    if(this.value) {
+        userText = (this.value);
+    }
+    
     link =  `https://api.qrserver.com/v1/create-qr-code/?size=150x150&data=${userText}` ;
     qrImg.src = link;
 }