Link to each platform’s documentation for parameters and guidelines

[xplosionmind]

Theoretically, the link preview behaviour is defined by The Open Graph Protocol, but, on top of that standard, each platform behaves differently, and has slightly different custom implementations.

Personally, I don’t know where to find the exact attributes and best practices suggested by each platform, even though I guess that @rafaelmardojai had to dive through all the detailed documentation available to build this super cool tool.

It would be nice if the reference documentation was made available (through a link/button) in the app.

[rafaelmardojai]

Here some quick notes:

• Discourse
  Figured out how it behaves by observing how it display different links with different metadata.
• Facebook
  https://developers.facebook.com/docs/sharing/webmasters
  https://developers.facebook.com/tools/debug/
• LinkedIn
  Tested different links with different metadata in their Post Inspector to mimic its behavior and the errors/warnings it prints.
• Mastodon
  Inspected Mastodon's scrapping/link previews code to see what it collects and shows.
  https://github.com/mastodon/mastodon/blob/main/app/lib/link_details_extractor.rb
  https://github.com/mastodon/mastodon/blob/main/app/javascript/mastodon/features/status/components/card.jsx
• Twitter
  https://developer.x.com/en/docs/twitter-for-websites/cards/overview/abouts-cards