When giscus is enabled, pages can be slow in loading while waiting for giscus to load. However giscus has a `data-loading="lazy"` option. On https://giscus.app this is described as:

> Loading of the comments will be deferred until the user scrolls near the comments container. This is done by adding loading="lazy" to the <iframe> element.

Currently quarto does not recognise the `data-loading` key. See here for the list of currently supported giscus keys: https://quarto.org/docs/reference/projects/websites.html#giscus

I propose to add this key. 
dragonstyle
2022-07-12T05:24:36Z
gustavdelius
good-first-issue
v1.1
closed
For giscus implement `data-loading: lazy` to speed up page loading
https://github.com/quarto-dev/quarto-cli/issues/1357