what is express.js
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => res.send('Hello World!'))
app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))
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3.89
9
// node js -> express -> basic example: static folder, 404 page
const express = require('express');
const path = require('path');
const PORT = process.env.PORT || 5000;
const app = express();
function error404(req, res) {
res.status(404);
if (req.accepts('html')) {
res.sendFile(path.join(__dirname, 'public/errors/404.html'));
return;
}
if (req.accepts('json')) {
res.send({
status: 404,
error: 'Not found'
});
return;
}
res.type('txt').send('404 - Not found');
}
app
.use(express.static(path.join(__dirname, 'public')))
.use(error404)
.listen(PORT, () => console.log(`Listening on ${ PORT }`));
Thank you!
9
0
4
9
basic server
const express =require('express');
const app = express();
const PORT = 5000;
app.get('/',(req,res)=>{
res.json({message: 'Welcome to the backend'})
})
app.listen(PORT ,()=>console.log(`Connected to ${PORT}`)
Thank you!
9
0
4.13
8
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => {
res.send('Hello World!')
})
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`)
})
Thank you!
8
0
4
1
Express is a minimal and flexible Node.js web application framework
that provides a robust set of features for web and mobile
applications.
Thank you!
1
0
4.5
6
// Load HTTP module
const http = require("http");
const hostname = "127.0.0.1";
const port = 8000;
// Create HTTP server
const server = http.createServer((req, res) => {
// Set the response HTTP header with HTTP status and Content type
res.writeHead(200, {'Content-Type': 'text/plain'});
// Send the response body "Hello World"
res.end('Hello World\n');
});
// Prints a log once the server starts listening
server.listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
})
Thank you!
6
0
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