Optimize your React application by eliminating debug code before deploying it to production

Currently, I am developing a React App within an npm environment.

Throughout my JavaScript code, I have the following snippet in multiple JS files:

...
let url = loc.protocol + "//" + loc.hostname + (loc.port ? ":" + loc.port : "") + "/" + baseUrl;
if (DEBUG) {
  url = "http://myTestPlatform.com/webapp";
}
...

During the development stage of my WebApp (using npm start), I need the debug code to be active. However, when generating the production build (using npm build), I want all debugging code to be removed.

Any suggestions on how I can achieve this would be greatly appreciated!

Thank you,

Sebastien

javascriptdebuggingnpmbuild

Answer №1

Setting up logging middleware in your app.js (or main server file) before defining any routes ensures it is only active when not in production mode. This setup needs to be done just once.

'use strict'

const express = require('express');
const app = express();
const morgan = require('morgan') // or your chosen logging middleware

if (process.env.NODE_ENV !== 'production') {
  // Implementing logging middleware for non-production environment
  app.use(morgan('dev'));
}  

...

module.exports = app;

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