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How to join two strings in JavaScript
Find out how to combine strings using JavaScript
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Links used to activate JavaScript functions
Which "href" value should I use for JavaScript links, "#" or "javascript:void(0)"?
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What's the difference between using let and var in JavaScript?
When should you use let over var? And why? Let's find out!
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How to install an older version of a Homebrew package
Installing an older version of some package using Homebrew can be more complex than you expect
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How to pass multiple parameters to a partial in Hugo
How do you pass multiple parameters to a partial in Hugo? It's not as simple as it seems, you need to use a trick. Let's find out.
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What is Imposter Syndrome
What's this syndrome all about? Do you have it? How do you fix the imposter feeling?
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How to disable a button using JavaScript
Find out how to programmatically disable or enable a button using JavaScript
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How to copy to the clipboard using JavaScript
Find out how to copy to the clipboard using JavaScript using the Clipboard API
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Why you should not modify a JavaScript object prototype
Find out why you should not modify a JavaScript object prototype and what to do instead
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How to add item to an array at a specific index in JavaScript
Find out how to add item to an array at a specific index in JavaScript
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How to create a comment in HTML
Find out how to add comments to an HTML page
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How to break out of a for loop in JavaScript
Find out the ways you can use to break out of a for or for..of loop in JavaScript
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How to check if an object is empty in JavaScript
Find out how to see if a variable is equivalent to an empty object
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How to return the result of an asynchronous function in JavaScript
Find out how to return the result of an asynchronous function, promise based or callback based, using JavaScript
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How to check if a checkbox is checked using JavaScript?
Find out how to check the state of a checkbox, looking if it is checked or not, using JavaScript
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How to write Unmaintainable Code
25 actionable tips to write code as unmaintainable as possible
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Is JavaScript still worth learning?
Is there still demand for JS developers? Or is JavaScript becoming obsolete?
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What is a port
Find out what is a port in networking
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Having a business mindset for developers
Most developers I know don't care about business. At all. They have zero business knowledge, not even common sense about what business is all about.
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The definitive guide to XSS
A guide to cross-site scripting attacks. How do they work? How can you prevent them?
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Which equal operator should be used in JavaScript comparisons? == vs ===
You can use two different operators to check for object equality. They are `==` and `===`. Which one to use?
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What does the double negation operator !! do in JavaScript?
You might find the `!!` operator used in the wild. What does it mean?
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Accessibility on the Web
Discover the basics of accessibility in HTML
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How to create an HTML attribute using vanilla Javascript
What if you have to add an attribute to an HTML element in the DOM, using vanilla JavaScript?
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How to check if a JavaScript array contains a specific value
Given a JavaScript array, how do you check if it contains a specific item?
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How to remove all children from a DOM element
Given a DOM element, how do you remove all its children?
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Touch events
Discover the basics of working with touch events in JavaScript
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How to check types in JavaScript without using TypeScript
Find out how to add types to JavaScript without using TypeScript
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HTML container tags
Discover how to use container tags in HTML and find out which one to choose
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How to rename fields when using object destructuring
Find out how to rename an object field while destructuring
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Mouse events
Discover the basics of working with mouse events in JavaScript
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How to put an item at the bottom of its container using CSS
Find out how to stick an item at the bottom of its container using CSS
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How to authenticate using GraphQL Cookies and JWT
An authentication process example for a GraphQL API powered by Apollo, using Cookies and JWT
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Unix Shells Tutorial
An introduction to Unix shells and how to use them
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Keyboard events
Discover the basics of working with keyboard events in JavaScript
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The HTML `figure` tag
Discover the basics of working with the HTML `figure` tag
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Every developer should have a blog. Here’s why, and how to stick with it
A blog is useful for many reasons. In this post I highlight my thoughs on this topic.
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Tutorial purgatory from the perspective of a tutorial maker
How to stop reading tutorials and start doing things
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The HTML `picture` tag
Discover the basics of working with images and the HTML `picture` tag, and how to make them responsive
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Handling forms in JavaScript
Discover the basics of working with forms in HTML and JavaScript
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How to work with scrolling on Web Pages
Discover how to interact with scrolling, react to scroll events and throttle them
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Web Components Custom Elements
An introductory tutorial to Custom Elements
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The HTML `a` tag
Discover the basics of working with the HTML `a` tag to create links
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The HTML `img` tag
Discover the basics of working with images and the HTML `img` tag, and how to make them responsive
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How to use the Drag and Drop API
Discover how to use the Drag and Drop API to create interactive experiences for your users
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HTML tables
Discover the basics of working with HTML tables
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HTML tags for text
Discover the various HTML tags you can use to print text on a page
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The HTML `audio` tag
Discover the basics of working with the HTML `audio` tag
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The HTML `video` tag
Discover the basics of working with the HTML `video` tag
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How to use getUserMedia()
Discover how to use getUserMedia() to get access to audio and video input from the user
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HTML forms
Discover how to use forms in HTML and all the form elements tags
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The HTML `iframe` tag
Discover the basics of working with the HTML `iframe` tag
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An introduction to HTML
Discover HTML from its history and the basic building blocks
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How to use the Geolocation API
Using the Geolocation API we can ask the browser for the user's position coordinates
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How to disable text selection using CSS
Find out how to disable text selection using the CSS property `user-select`
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All the software projects I made in the past
A long list of the projects I made throughout the years
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How to use the JavaScript bcrypt library
Find out how to hash and check passwords in JavaScript with the bcrypt library
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The Reach Router Tutorial
A quickstart to using Reach Router in your React app
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JavaScript Symbols
An easy to follow tutorial to understand JavaScript Symbols
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The CSS z-index property
How to work with the `z-index` property in CSS
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How to connect your React app to a backend on the same origin
How to serve a React and a server-side backend app from the same origin, without having to use CORS on the server and worrying about ports
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How to use the useReducer React hook
Find out what the useReducer React hook is useful for, and how to work with it!
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How to use the useContext React hook
Find out what the useContext React hook is useful for, and how to work with it!
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How to use the useRef React hook
Find out what the useRef React hook is useful for, and how to work with it!
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How to use the useMemo React hook
Find out what the useMemo React hook is useful for, and how to work with it!
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How to use the useEffect React hook
Find out what the useEffect React hook is useful for, and how to work with it!
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How to use the useCallback React hook
Find out what the useCallback React hook is useful for, and how to work with it!
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How to use the useState React hook
Find out what the useState React hook is useful for, and how to work with it!
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The Navigator Object
Find out what is the Navigator object and how to use it
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JavaScript Public Class Fields
A simple tutorial on the new JavaScript Public Class Fields
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How to sort an array by date value in JavaScript
Find out how to sort an array of items by date value in JavaScript
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The FormData Object
Find out what is a FormData object and how to use it
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How I record my videos
A detailed description of how I do my videos. Mostly as a reference to myself.
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How to make your first Pull Request on GitHub
How do you create a PR to edit a project on GitHub?
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Have you filled a developer bucket today?
Or, how to be more fulfilled as a developer. And make other developers have a more fulfilled life too.
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JavaScript Private Class Fields
Introduction and code samples on using private class fields in JavaScript.
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How to add an event listener to multiple elements in JavaScript
Say you want to add an event listener to multiple elements in JavaScript. How can you do so?
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How to get the value of a CSS property in JavaScript
Say you want to fetch the value of a CSS property in a web page, one that is set using a stylesheet. How can you do so?
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JavaScript Operators
Operators allow you to get one or more simple expressions and combine them to form a more complex expression.
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The Streams API
Using streams we can receive a resource from the network, or from other sources, and process it as soon as the first bit arrives
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CSS Normalizing
Why and how to use CSS normalizing
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How to create a GraphQL Server with Node.js and Express
A simple tutorial on how to create a Node.js and Express powered GraphQL server
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How to enable ES Modules in Node.js
How do you enable the `import` syntax in Node.js?
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How to get the real number of pageviews of a static site
Given a static site, how do you get the real count of visitors?
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The CSS float property and clearing
How to work with the `float` property in CSS and with clearing
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The JavaScript `in` operator
Learn the basics of the JavaScript `in` Operator
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CSS Padding
How to work with padding in CSS
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How to get the value of an input element in React
Given a form, how do you get the value of one of the form fields?
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CSS Fonts
Learn how to work with fonts in CSS
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CSS Comments
How to work with comments in CSS
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The JavaScript reduce() Function
The details of the `reduce()` Function in JavaScript
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The JavaScript map() Function
The details of the `map()` Function in JavaScript
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The JavaScript filter() Function
The details of the `filter()` Function in JavaScript
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The JavaScript Global Object
The details of the Global object in JavaScript
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JavaScript Error Objects
The various Error objects you will find in JavaScript
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CSS Backgrounds
Learn how to change the background of an element using CSS
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JavaScript Object Properties
Find out all you need to know about JavaScript Object Properties
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JavaScript Recursion
Learn the basics of Recursion in JavaScript
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CSS Box Sizing
How to work with box sizing in CSS
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JavaScript Ternary Operator
Learn the basics of the JavaScript Ternary Operator