React application on node express server - how to route - node.js

Question

I have simple express server in node:
const express = require('express')
const path = require('path')
const application = express()
const port = process.env.PORT || 80
const PUBLIC_DIR = 'public'
application.use(express.static(path.join(__dirname, PUBLIC_DIR)))
application.listen(port)
//handle 404
application.use((req, res) => {
res.send('404: Page not Found', 404)
});
//handle 500
application.use((error, req, res, next) => {
res.send('500: Internal Server Error', 500)
});
console.log(['HTTP server running on ', process.env.HOST, ' / ', port].join(''))
When I put "builded" react app into folder public, server return index.html good. But problem is in react routers.
I have routers like this:
/
/home
/about
When I go to url localhost/ - works fine, return index html with full app, but problem is when I go to /home, /about, server return 404, how to fix it? How to redirect to react route? I hope you understand me.
Thank you for any help

Answer 1

after you build the react try using :-
app.use(require('body-parser').json({ limit: '50mb' }));
app.use(require('body-parser').urlencoded({ limit: '50mb', extended: true, parameterLimit: 1000000 }));
app.use(express.static(path.join(__dirname, '../client')));
switch (process.env.NODE_ENV) {
case 'production':
app.use(express.static('./client/build/'));
app.use('/', express.static('./client/build/index.html'));
break;
default:
app.use(express.static('./client/'));
app.use(express.static('./', config.staticOptions));
app.use('/', express.static('./client/index.html'));
break;
}

Answer 2

Try to return all the routes from index.html as follows:
const express = require('express')
const path = require('path')
const application = express()
const port = process.env.PORT || 80
const PUBLIC_DIR = 'public'
application.use(express.static(path.join(__dirname, PUBLIC_DIR)))
application.listen(port)
app.use(express.static('client/build')); //use your build path my build path under the root folder is client/build
const path = require('path');
app.get('*', (req, res) => {
res.sendFile(path.resolve(__dirname, 'client','build', 'index.html')); //use your build path my build path under the root folder is client/build
});
//handle 404
application.use((req, res) => {
res.send('404: Page not Found', 404)
});
//handle 500
application.use((error, req, res, next) => {
res.send('500: Internal Server Error', 500)
});
console.log(['HTTP server running on ', process.env.HOST, ' / ', port].join(''))