In this post, Blackle Mori shows you a few of the hacks found while trying to push the limits of Cohost’s HTML support. Use these if you dare, lest you too get labelled a CSS criminal.

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Cohost.org, a niche social media site that went public in June 2022 and shut down in September 2024, had a devoted user base of creatives who leveraged its permissive HTML sanitizer to perform unique CSS tricks. Notable techniques included 'width-hacking' using the <details> and <summary> tags, and creative use of SVG animations. Despite its short lifespan, Cohost delivered a unique posting experience free from advertisements and follower counts.

The Lost CSS Tricks of Cohost.org

<p>It’s clever what you can pull off when you’re faced with a lot of constraints, like being forced to work with inline styles.</p>
