what is the elementId in Html5Qrcode constructor ?

[ghost]

I'm trying to use Html5Qrcode since I have an UI .
While initialising Html5Qrcode , it is requried to pass in a elementID .
Now, what is the element id here ?
My camera preview is rendered on a canvas , so should I pass the canvas ID ?
Also is there a detailed doc on how to Html5Qrcode ?

[MarkerB]

There are docs on how to use Html5Qrcode, including this one that shows a specific example of the <div> container for the video preview:

https://scanapp.org/html5-qrcode-docs/docs/intro#setup-a-target-html-container