Relevant: https://en.wikipedia.org/wiki/Apple_Computer,_Inc._v._Microsoft_Corp https://en.wikipedia.org/wiki/Apple_Computer,_Inc._v._Micros.... and https://en.w

Relevant: https://en.wikipedia.org/wiki/Apple_Computer,_Inc._v._Microsoft_Corp https://en.wikipedia.org/wiki/Apple_Computer,_Inc._v._Micros.... and https://en.wikipedia.org/wiki/Lotus_Development_Corp._v._Borland_International,_Inc https://en.wikipedia.org/wiki/Lotus_Development_Corp._v._Bor.... In summary, this probably isn't infringing unless they lifted the actual HTML from Slack or similar