A web framework used by a fifth of all internet websites plans to drop support for Internet Explorer 10 and 11. The move is scheduled for Bootstrap v5, set to be released later this year. Bootstrap is a user interface (UI) framework initially designed at Twitter and later open-sourced.
https://www.zdnet.com/article/bootstrap-a-ui-framework-used-by-20-of-internet-sites-is-dropping-ie-support/#ftag=RSSbaffb68
https://www.zdnet.com/article/bootstrap-a-ui-framework-used-by-20-of-internet-sites-is-dropping-ie-support/#ftag=RSSbaffb68