Than today, Microsoft discontinued support for older versions of IE. Starting with React v15, we’re discontinuing React DOM’s support for IE 8. We’ve heard that most React DOM apps already don’t support old versions of Internet Explorer, so this shouldn’t affect many people. This change will help us develop faster and make React DOM even better.
I’m going to lock this thread because it’s very old and any new discussion should probably happen on a new thread with a more specific title!