If your app works fine until you hit “reload” or manually type in a URL and then get a 404 error, then your server is not configured correctly.
Whether you are server-rendering or not, all apps using Reach Router need to be configured to deliver the same JavaScript code at every URL.
For non-server rendered apps, we recommend develping with create react app, and for your production file server we recommend serve.
If you can’t use either of these tools, you will need to learn how to configure your server to serve your index.html file at every url.
Here’s an example in express:
const path = require("path")
const express = require("express")
const app = new express()
// requests for static files in the "public" directory
// like JavaScript, CSS, images will be served
app.use(express.static("public"))
// Every other request will send the index.html file that
// contains your application
app.use("*", function(req, resp) {
resp.sendFile("/public/index.html")
})
app.listen("8000")
Paul Sherman has written an in-depth article about this, if you’re still unclear we recommend you give it a read: Single-Page Applications and the Server