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This article describes how to migrate an existing Node.js application to the Node.js Selector in cPanel.
In most cases, Node.js applications can be migrated to Node.js Selector with only minor modifications. To do this, follow these steps:
const express = require('express')
const app = express()
const port = 3000
app.get('/myapp', (req, res) => res.send('Hello World!'))
app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))
This code can be modified to obtain a port number dynamically as follows:
const express = require('express')
const app = express()
app.get('/myapp', (req, res) => res.send('Hello World!'))
const server = app.listen(0, () => {
console.log('Example app listening at http://localhost:', server.address().port);
});
The parameter 0 in the app.listen() statement instructs Node.js to obtain a port number dynamically.
Import directives: Some Node.js versions do not support import directives. Therefore, you should modify any import statements to use require instead. For example, consider the following statements:
import express from "express"; import path from "path"; import dotenv from "dotenv";
These statements can be modified to work correctly as follows:
const express = require('express'); const path = require('path'); const dotenv = require('dotenv');
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