target are not used. However, when the
link-to-post refers to a post which is not currently loaded in the DOM (e.g. it is the OP), then the href is used, and we need to add a
target to prevent page navigation within the embed iframe.
rel="noreferrer noopener" needed here?
I don’t think so - the href will always an ‘internal’ link within the forum domain. We don’t add
noreferrer noopener to other internal links in Discourse.