Don't attempt to build a SPA if you are support browsers that old (even IE8 imo). Give them a traditional server-rendered app and they'll be happy. Since you'v

Don't attempt to build a SPA if you are support browsers that old (even IE8 imo). Give them a traditional server-rendered app and they'll be happy. Since you've already built with React, the good news is that it's easy to build a React app that you deploy as a server-rendered app. Just make sure you are doing things in normal HTML, like forms, and not relying on xhr/fetch.