TypeError: Cannot set property 'QRious' of undefined

[clawfire]

Line 22 (global.QRious = factory()); got me the error TypeError: Cannot set property 'QRious' of undefined

My code was a simple

var qrcode = new QRious({
    element: canvas,
    value: "plop",
    size: 300,
    level: "M"
});

[ROBERT-MCDOWELL]

is you canvas variable exist?

[clawfire]

yep

[ROBERT-MCDOWELL]

did you import Qrious class after the html element?
replace also canvas by img element