Page Not Found on Netlify with React Router
You might run into the following error after deploying a single page React site using React Router to Netlify.
Page Not Found
Looks like you've followed a broken link or entered a URL that doesn't exist on this site.
Error message on Netlify
React Router handles routing on the client side (browser) so when you visit non-root page (e.g. https://yoursite.netlify.com/else), Netlify (server-side) does not know how to handle the route.
(As your routes are set up in the root level).
Here is the simplest code using React Router.
And the error occurring on Netlify when you go to https://<netlify domain>/else directly.
Page Not Found Demo
Netlify offers a special file, _redirects, which you can add to your code base and let Netlify handle how to handle the URL that is not handled on the client-side.
Netlify documentation has a section, History Pushstate and Single Page Apps, which shows you how to redirect to the root of your SPA URL (but doesn't mention React Router, as it applies to other client-side frameworks/libraries).
So to fix the issue, we need to create a file named _redirects to the root of your site with following content.
_redirect static file
Change _index.html_ accordingly to match the SPA root.
Here is the working site.
Netlify successfully redirected to the SPA root
For more ways & restrictions for redirect, check out the official Netlify documentation.