Why my browser shows blank page when I run express server (React.js)?
Question
I'm new to React. I want to deploy my react project to Heroku. To do that I implemented a simple express server. But nothing renders on my browser at localhost:3000 when I run the server with node server/server.js . Am I missing something obvious here?
My project structure:
server.js:
const path = require('path');
const express = require('express');
const app = express();
const port = process.env.PORT || 3000;
// console.log that your server is up and running
app.listen(port, () => console.log(`Listening on port ${port}`));
// create a GET route
app.get('/*', (req, res) => {
res.send(res.sendFile(path.join(__dirname, '../src/index.html')));
});
index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="theme-color" content="#000000" />
<meta
name="description"
content="Web site created using create-react-app"
/>
<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
<title>React App</title>
</head>
<body>
<noscript>You need to enable JavaScript to run this app.</noscript>
<div id="root"></div>
</body>
</html>
1 answers
solution1
3 ACCPTED 2020-10-14 18:25:08
There is no index.html in src . With create-react-app the file index.html it would be put into build when command npm run build is executed. It generates an index.html with urls to the JS/CSS dynamically injected. One option is you you could consider putting the React application into public , then target index.html of the build folder generated by npm run build :
// create a GET route
app.get('/*', (req, res) => {
// update this path to match how you set up express to serve static and where your build is output to
res.send(res.sendFile(path.join(__dirname, 'public', 'path', 'to', 'build', 'index.html')));
});
Also you need to make sure you have static file serving set up for express:
app.use(express.static('public'))
static can also target multiple directories in case you don't want to nest your react project too deeply:
app.use(express.static('public'))
app.use(express.static('build'))
It's fairly common to have static assets in public such as images, but regardless of the structure you choose, you need to specify a path for static assets including the HTML, CSS, and JS generated by create-react-app build.
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