Node JS Routes

const fs = require('fs')

const handleRequest = (req, res) => {
    const url = req.url
    const method = req.method

    if (url === '/') {
        res.setHeader('Content-Type', 'text/html')
        res.write('<html><head><title>Home!</title></head>')
        res.write('<body><h1>Welcome Nameless!</h1><form action="/create-user" method="GET"><button>CREATE USER</button></body>')
        res.write('</html>')
        return res.end()
    }

    if (url === '/create-user' || method === 'GET') {
        res.statusCode = 200
        res.setHeader('Content-Type', 'text/html')
        res.write('<html><head><title>Home!</title></head>')
        res.write('<body><form action="/users" method="POST"><input type="text" name="username"><button type="submit">LOGIN</button></form></body>')
        res.write('</html>')
        return res.end()
    }

    if (url === '/users' && method === 'POST') {
        const requestBody = []

        req.on('data', chunk => {
            requestBody.push(chunk)
        })

        return req.on('end', () => {
            const parsedBody = Buffer.concat(requestBody).toString()
            const username = parsedBody.split('=')[1]

            res.statusCode = 200
            res.setHeader('Content-Type', 'text/html')
            res.write('<html><head><title>Home!</title></head>')
            res.write(`<body><h1>Welcome, ${username}!</h1></body>`)
            res.write('</html>')
            return res.end()
        })
    }

    res.statusCode = 302
    res.setHeader('Location', '/')
    res.end()
}

module.exports = handleRequest