How can I append QR code to already existing canvas element?

[DavidLJz]

const canvas = document.getElementById("canva");

... 

const qr = new QRious({
    size: 250,
    value: 'value',
    foreground: 'black',
});

I want to render the QRious object on already existing canvas with specific dimensions. How to do that?

Edit: Sorry, I figured it out

    ctx = canvas.getContext("2d");

    const img = new Image();

    img.onload = () => {
        ctx.drawImage(img, 425, 700, 250, 250)
    };

    img.src = qr.toDataURL('image/jpeg');