This code uses the QRious library, which is a JavaScript library for generating QR codes. It includes the library in the head section of the HTML file with a script tag, and then adds a text input field and a button to the body section. When the button is clicked, it calls the generateQR function, which creates a new QRious object with the input text value as the value property and the canvas element as the element property. The QR code is then generated and displayed on the canvas.
