We want to serve appropriate images to all of our users, like small images on slower connections and small screens, and large, high-quality images on fast connections and high-resolution screens.
Luckily, all modern browsers support a few nifty HTML features to help us optimize our images for whatever device your users are visiting your site on.
I want to make a case for semantic HTML as a way to unlock the door to building accessible apps from the ground up. Accessibility is something that we must get better at slowly, not overnight, and if we do, we will end up saving time and become stronger developers.
A tutorial on how to make an input smoothing object from scratch and leverage it in a React component to smoothly animate a cursor.
When it comes to end-to-end testing React applications, Cypress is rapidly emerging as the community standard. While nothing about Cypress is React-specific, the design of its APIs pairs uniquely well with the nuances of React's reconciliation process and virtual DOM. In this post we'll dig into how Cypress works with React, focusing specifically on how it addresses the challenges of DOM-based testing and manipulation in the era of asynchronous web applications.
In this final post we tackle the last block of the old architecture graph presented in the first article.
I have a confession to make: I usually dread writing tests. I especially dread writing them early on in a project, when components are still subject to rapid change and iteration. A few weeks ago, I found myself in that position—I had written new components that needed test coverage, but I knew there were several iterations of both designs and features ahead of us.
In part three of our four-part series we will dive into the “meaty” part of the re-architecture, the one that every React Native developer has probably heard about: Fabric and TurboModules.
I ask that you forget what you know and take a few minutes to read this post in the hope that you too can be persuaded to liberate yourself from a toolchain conglomerate that once helped us be more productive, but is now almost certainly introducing unnecessary complexity, limitations, and overhead to our web apps and dev environments.
In part two of our four-part series we will dive into how React Native consumes the code you write, and how the re-architecture changes it.
In this first post in a four-part series, we discuss the aspect of the React Native re-architecture that will actually affect the code you may write—the new React features and a tool called Codegen.
The v4 release of styled-components comes with a lot of features and perfomance wins that we were excited about. If you're like me, you might look at the official v3 to v4 migration guide, see the codemod, and feel pretty confident that the migration should take you less than a day! Welp, I was wrong. Here are a few gotchas I ran into.
MongoDB is a document-based NoSQL database, and is a popular choice for applications in the Node ecosystem. This post is about testing in Node with MongoDB, however, and not about why you should or should not use MongoDB, so I’ll leave it to the pundits on Hacker News to hash that out.
Some of my favorite projects are website performance audits. Hunting for opportunities to make an application faster and leaner can be exciting. Recently Tyler Thompson and I had a chance to dive into an e-commerce website’s codebase and search for performance opportunities during a quick two-week sprint.
A complex distributed computing problem application developers may encounter is controlling access to a resource or entity in a multi-user, concurrent environment. How can we guard against an arbitrary number of concurrent processes from potentially mutating or even having any access to an entity simultaneously?
Needlessly duplicated dependencies produce larger, slower web applications. Let's embark on a deep dive into how npm and webpack work, see how inefficient duplicates can arise, and learn how the Inspectpack duplicates plugin can help.
We're very excited about what we learned at React Conf and we wanted to share our take on React Hooks, a new React API that gives React functional components the ability to use state and controlled side effects without the need for any additional helper libraries.
Formidable is thrilled to announce the release of Spectacle Boilerplate MDX. Now you can write your Spectacle presentations in markdown while seamlessly including React components and JSX.
Long before Node.js famously entered the backend development scene, the tech industry had experienced several evolutions of the "Next Big Thing" with both successful and failed patterns and techniques. In this article, we look at some of the shortcomings of Node.js programming models and how TypeScript offers the hope of increasing the legitimacy of Node.js ecosystem in the enterprise by bringing back some storied and successful programming paradigms from the past.
In the past two articles, we've talked a lot about redux-saga in the abstract, without much concern for real-world applications. Now that we’re equipped with new knowledge, we're ready to jump in and start putting the pieces back together. First, we'll take a look at a pattern...