How to loop over DOM elements from querySelectorAll

TL;DR: Use the for..of loop

How to add a class to a DOM element

TL;DR: Use the add() method on element.classList

How to wait for the DOM ready event in plain JavaScript

How to run JavaScript as soon as we can, but not sooner

Async vs sync code

The difference between running code synchronously or asynchronously

Why should you use Node.js in your next project?

When is it a good idea to use Node.js over other technologies? Why Node.js and not another solution? This post aims to answer that question.

How to write a JSON object to file in Node.js

Discover how to save a JSON object to file in Node.js, and retrieve it later

How to determine if a date is today in JavaScript

Discover how to find out if a Date object represents a today datetime

How to get the last updated date of a file using Node.js

Discover how to retrieve the last updated date of a file with Node.js

How to use Async and Await with Array.map()

Using async/await combined with map() can be a little tricky. Find out how.

How to remove a file with Node.js

Discover how to remove a file from the filesystem with Node.js

How to create an empty file in Node.js

Discover how create an empty file in a filesystem folder in Node.js

Disconnect time from money

How to make your earnings not depending on the hours you work, but to the number of products sold

The HTTP Status Codes List

Every HTTP response comes with a status code that signals with a clear number information about how the request was processed

Caching in HTTP

A detailed description of the caching options available through the HTTP protocol

The curl guide to HTTP requests

curl is an awesome tool that lets you create network requests from the command line

The HTTPS protocol

The HTTPS protocol is an extension of HTTP, the Hyper Text Transfer Protocol, that provide secure communication

The HTTP protocol

A detailed description of how the HTTP protocol, and the Web, work

The ES2018 Guide

ECMAScript is the standard upon which JavaScript is based, and it's often abbreviated to ES. Discover everything about ECMAScript, and the features added in ES2018, aka ES9

What is an RFC?

RFCs, Request for Comments, are publications from the technology community

The ES2017 Guide

ECMAScript is the standard upon which JavaScript is based, and it's often abbreviated to ES. Discover everything about ECMAScript, and the features added in ES2017, aka ES8

How to initialize a new array with values in JavaScript

Find out how you can initialize a new array with a set of values in JavaScript

Why should I create an email list?

95 people on 100 will never get back to your blog. They just found it by chance. Give them a reason to stay in touch.

The ES2016 Guide

ECMAScript is the standard upon which JavaScript is based, and it's often abbreviated to ES. Discover everything about ECMAScript, and the features added in ES2016, aka ES7

How to get the current URL in JavaScript

Find out the ways JavaScript offers you to get the current URL that's opened in the browser

How to create a multiline string in JavaScript

Discover how to create a multiline string

The ES6 Guide

ECMAScript is the standard upon which JavaScript is based, and it's often abbreviated to ES. Discover everything about ECMAScript, and the features added in ES6, aka ES2015.

The best podcasts for frontend developers

Some nice podcasts to listen to while commuting or in general when you are away from keyboard

How to check if a string starts with another in JavaScript

Checking if a string starts with another substring is a common thing to do. See how to perform this check in JavaScript

How to get the unique properties of a set of objects in a JavaScript array

Given an array of objects, here's what you can do if you want to get the values of a property, but not duplicated.

Product / market fit

Your product must meet the needs of a niche, solving a problem

How to validate an email address in JavaScript

There are lots of ways to validate an email address. Learn the correct way, and also find out all the options you have, using plain JavaScript

How to check if a file exists in Node.js

How to check if a file exists in the filesystem using Node.js, using the `fs` module

Remote working for software developers

Is remote working making you a more effective developer? A happier developer? How can you improve?

Node, the difference between development and production

Learn how to set up different configurations for production and development environments

The niche

Define your niche, your tribe. Those who belong to that tribe will strive to buy your product or at least will be strongly attracted, because it is specially made for them

Manage Cookies with Express

How to use the `Response.cookie()` method to manipulate your cookies

Handling CORS in Express

How to allow cross site requests by setting up CORS

Handling file uploads in forms using Express

How to manage storing and handling files uploaded via forms, in Express

The idea is nothing

Ideas are worthless. Execution plus idea is everything.

Handling forms in Express

How to process forms using Express

Work with HTTP headers in Express

Learn how to access and change HTTP headers using Express

Setup Let's Encrypt for Express

How to set up HTTPS using the popular free solution Let's Encrypt

Middleware in Express

A middleware is a function that hooks into the routing process, and performs some operation at some point, depending on what it want to do.

Have a purpose for your business

Having a purpose is a high-motivating factor to overcome challenges

Handling redirects with Express

How to redirect to other pages server-side

Retrieve the POST query parameters using Express

Found out how to retrieve the POST query parameters using Express

The Node events module

The events module of Node.js provides the EventEmitter class

The Node os module

The os module of Node.js provides useful functions to interact with underlying system

Generating value

As a product business, anything you ship creates value

Express, Request Parameters

A handy reference to all the request object properties and how to use them

How to exit from a Node.js program

Learn how to terminate a Node.js app in the best possible way

How to read environment variables from Node.js

Learn how to read and make use of environment variables in a Node.js program

The Pug Guide

How to use the Pug templating engine

An Express HTTPS server with a self-signed certificate

How to create a self-signed HTTPS certificate for Node.js to test apps locally

The freedom of a product business

A solo-owned product business can provide one of the highest levels of freedom

Error handling in Node.js

How to handle errors during the execution of a Node.js application

Routing in Express

Routing is the process of determining what should happen when a URL is called, or also which parts of the application should handle a specific incoming request.

Sanitizing input in Express using express-validator

Send files using Express

Express provides a handy method to transfer a file as attachment: `Response.download()`

Developers, learn marketing

A developer knowing marketing has a powerful combination of skills

Send a response using Express

How to send a response back to the client using Express

Express Sessions

How to use sessions to identify users across requests

Send a JSON response using Express

How to serve JSON data using the Node.js Express library

Create your own job security

The only way to have control over your future is to have your own business

Serving Static Assets with Express

How to serve static assets directly from a folder in Express

Express Templates

Express is capable of handling server-side template engines. Template engines allow us to add data to a view, and generate HTML dynamically.

Validating input in Express using express-validator

Learn how to validate any data coming in as input in your Express endpoints

The basics of working with MySQL and Node

MySQL is one of the most popular relational databases in the world. Find out how to make it work with Node.js

As an indie maker, what kind of product should you build?

Using WebSockets with Node.js

WebSockets are an alternative to HTTP communication in Web Applications. They offer a long lived, bidirectional communication channel between client and server.

The Node http module

The http module of Node.js provides useful functions and classes to build an HTTP server

The Node path module

The path module of Node.js provides useful functions to interact with file paths

Build your own platform

What is a platform, why having your own platform is important

Working with folders in Node

How to interact with folders using Node

Working with file descriptors in Node

How to interact with file descriptors using Node

Node file stats

How to get the details of a file using Node

Writing files with Node

How to write files using Node

Node File Paths

How to interact with file paths and manipulate them in Node

Reading files with Node

How to read files using Node

HTTP requests in Node using Axios

Axios is a very convenient JavaScript library to perform HTTP requests in Node.js

The Node fs module

The fs module of Node.js provides useful functions to interact with the file system

Making HTTP requests with Node

How to perform HTTP requests with Node.js using GET, POST, PUT and DELETE

Build an HTTP Server

How to build an HTTP server with Node.js

The Node Event emitter

How to work with custom events in Node

Understanding setImmediate()

The Node.js setImmediate function interacts with the event loop in a special way

Understanding process.nextTick()

The Node.js process.nextTick function interacts with the event loop in a special way

The Node.js Event Loop

The Event Loop is one of the most important aspects to understand about Node

Build a lifestyle business

This article will help you discover how to achieve freedom

npm dependencies and devDependencies

When is a package a dependency, and when is it a dev dependency?

npm global or local packages

When is a package best installed globally? Why?

Uninstalling npm packages

How to uninstall an npm Node package, locally or globally

Accept input from the command line in Node

How to make a Node.js CLI program interactive using the built-in readline Node module

Output to the command line using Node

How to print to the command line console using Node, from the basic console.log to more complex scenarios

How to use the Node.js REPL

REPL stands for Read-Evaluate-Print-Loop, and it's a great way to explore the Node features in a quick way

Node, accept arguments from the command line

How to accept arguments in a Node.js program passed from the command line

How much JavaScript do you need to know to use Node?

If you are just starting out with JavaScript, how much deeply do you need to know the language?

How to install Node.js

How you can install Node.js on your system: a package manager, the official website installer or nvm

A brief history of Node.js

A look back on the history of Node.js from 2009 to today

Node Buffers

Learn what Node buffers are, what they are used for, how to use them

Get HTTP request body data using Node

Find out how to extract the data sent as JSON through an HTTP request body using Node