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Prefetching content in Next.js
How prefetching works in a Next.js app
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Styling Next.js components using CSS
How to style React components in Next.js?
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Feed data to a Next.js component using getInitialProps
How to feed data to a Next.js component using getInitialProps
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Dynamic content in Next.js with the router
How to setup dynamic content in a Next.js site
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Linking two pages in Next.js using Link
How to link two or more pages in Next.js
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How to use the React Developer Tools
Learn this very useful tool we absolutely need to install when building a React application.
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JavaScript Optional Chaining
Learn this new, upcoming feature of JavaScript
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JavaScript Dynamic Imports
Learn this new, upcoming feature of JavaScript
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How to install Next.js
Step by step instructions to get started with Next.js
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Next.js vs Gatsby vs create-react-app
Next.js or Gatsby? Why choosing them over create-react-app? And which one?
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How to use top-level await in ES Modules
Learn how to use this new feature currently available in v8
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How to calculate the number of days between 2 dates in JavaScript
I had this problem: how do I calculate the number of days between 2 dates?
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I posted my password / API key on GitHub
Or GitLab, or any other public source control management platform. Now what?
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How to iterate over object properties in JavaScript
Here's a very common task: iterating over an object properties, in JavaScript
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How to format a date in JavaScript
Here's a very common task: how do you format a date with JavaScript?
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How to handle file uploads in Node.js
How to use Node.js and in particular Express to handle uploaded files
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How to upload a file using Fetch
How to upload files to the server using the Fetch API, explained in a simple way
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How to get both parsed body and raw body in Express
Find out how to get both parsed body and raw body in Express with `body-parser`
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How to use Firebase Firestore as your database
A tutorial to set up Firestore as a database, a very convenient solution to your storage problems!
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Responsive pre tags in CSS
I've had some problems with responsiveness in a few posts, on my blog. Turned out it was code snippets
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How to get the days between 2 dates in JavaScript
Given two JavaScript `Date` objects, how can I get a list of the days (expressed as Date objects, too) between those 2 dates?
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How to wait for 2 or more promises to resolve in JavaScript
Say you need to fire up 2 or more promises and wait for their result. How to do that?
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How to set an alias in a macOS or Linux shell
How to set an alias in a UNIX environment, including Bash, Zsh, Fish on both macOS and Linux
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JavaScript labeled statements
A tutorial about a very rarely used JavaScript feature: labeled statements
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Cross-component State Management in Svelte
How to work with Props, the Context API and Stores in Svelte to pass state around your application cross components
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Working with events in Svelte
Learn how to work with events in Svelte
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Resolve promises in Svelte templates
Learn how to work with promises in Svelte templates
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Svelte templates: loops
Learn how to work with loops in Svelte templates
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Svelte Lifecycle Events
How to work with Lifecycle Events in Svelte
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How to update a Git branch from another branch
Given a Git branch that's not up to date with another branch, how do you merge the changes?
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How to check if a date refers to a day in the past in JavaScript
Given a JavaScript date, how do you check if it references a day in the past?
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Reactive Statements in Svelte
How to work with Reactive Statements in Svelte
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Handling State Updates in Svelte
How to use reactive assignments in Svelte to work with state updates within a component
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Svelte Bindings
How to work with bindings in Svelte
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How to check if two dates are the same day in JavaScript
How do you detect if a date object instance in JavaScript refers to the same day of another date object?
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How to get the month name from a JavaScript date
Given a JavaScript Date object instance, how can you get a string that represents the month name?
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How to get yesterday's date using JavaScript
How do you get yesterdays' date using JavaScript?
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How to get tomorrow's date using JavaScript
How do you get tomorrow's date using JavaScript?
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How to add comments in Svelte templates
How to avoid Svelte to render parts of a template to the client
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Svelte Slots
How to work with slots in Svelte to define components that can be composed together
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How to rerender a Svelte component on demand
How to rerender a Svelte component on demand and in particular how to rerender it when I want to run a function prop again
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How to invert colors using CSS
How to invert colors of elements and images using CSS
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How to send urlencoded data using Axios
Learn how to send urlencoded data using Axios
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Svelte templates: conditional logic
Learn how to work with templates in Svelte and in particular how to use conditionals
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How to export functions and variables from a Svelte component
Learn how to export functions and variables from a Svelte component
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How to import components in Svelte
Learn how to import components in Svelte
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How to work with props in Svelte
Learn how to work with props in Svelte and let two components with a parent/child relationship communicate with each other
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Getting started with Svelte - a short tutorial
How to get started with Svelte
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How I stopped worrying and learned to love the JavaScript ecosystem
A journey to solve JavaScript Fatigue
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How to spawn a child process with Node.js
Find out how to spawn a child process with Node.js
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How to get last element of an array in JavaScript?
Find out how to get last element of an array in JavaScript
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How to check if a JavaScript value is an array?
Find out how to determine if a JavaScript value is an array using the `Array.isArray()` method
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How to work from home without going crazy
Some advice from a 10+ years remote working experience
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How to join two arrays in JavaScript
Find out how to merge two or more arrays using JavaScript
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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