Using Tippyjs to Implement Link Previews
On May 16, 2020 I implemented link previews on the notes section of my website. Hopefully you can see what I mean just by hovering over those links. I did this using TippyJS and modifying the query on theprogramming.language.js.gatsby.gatsby-theme-brain package I used at the time for my notes.
In addition to regular mdx data
gatsby-theme-brain allows you to query the InboundReferenceNotes - the notes that reference this note - and the OutboundReferenceNotes - the notes that this note references. This means that in order to get link previews working I just made sure that I queried the childMdx property for both Inbound and Outbound Notes and grabbed the body property from childMdx which contains Markdown that is ready to be rendered with an MDXRenderer. Then I had to pass all of the OutboundReferenceNote information - slug, title, and body - to the MDXcomponent I used to parse my links.
In my mdx-components-with-previews.js file I added logic that checks each link and for any link to an OutboundReferenceNote, it substitutes the regular link with a Tippy tooltip that has as an MDXRenderer wrapped around the markdown body as its tooltip.
The tricky thing is that you can get into an infinite loop of tooltips in densely linked notes. What I ended up doing to get around this is using a different MdxComponent provider for the tooltips then for the rest of my notes. This makes sure that my tooltips don’t go on to generate more tooltips.