Onebox converts your web links into useful preview excerpts that help inform readers about the target before they click through. To create a onebox, simply paste any link into a post on a line by itself, like so:
Which results in …
In addition to supporting general oEmbed and OpenGraph tags, Onebox has many custom rules for extremely popular sites including Wikipedia, Twitter, Amazon, Youtube, Soundcloud, Stack Overflow, Github and more.
Try it out! Play around with pasting links into your posts and see what happens. Experiment! Just remember, for oneboxing to work, the link must be on a line by itself!
enable inline onebox on all domains site setting enabled*, pasting the link “inline” with the text, will replace the raw link with the title of the page, like this Understanding Discourse Trust Levels
like this https://blog.discourse.org/2018/06/understanding-discourse-trust-levels/
* this feature is enabled by default
If you want the link to show up as a plain, unadorned raw link, place it in
Alternately you can place a space before the link, or any characters after the link.
You can add a link to your text by using the chain-link button in the editor toolbar, by selecting some text in your post and pasting a link from your clipboard, or by adding Markdown / BBCode / HTML links:
<a href="https://example.com">link here</a>
<iframe> is blocked for security reasons, but if they are from a highly trusted source, a Discourse admin can explicitly whitelist that domain as an
<iframe> target in the site settings.
You may need to paste the full
embed code such as the map above:
<iframe src="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d24202.451099423397!2d-74.06201522657554!3d40.68924937923285!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x89c25090129c363d%3A0x40c6a5770d25022b!2sStatue+of+Liberty+National+Monument!5e0!3m2!1sen!2suk!4v1533203877892" width="600" height="450" frameborder="0" style="border:0" allowfullscreen></iframe>