A rather geeky/technical weblog, est. 2001, by Bramus
React introduced hooks one year ago, and they’ve been a game-changer for a lot of developers. There are tons of how-to introduction resources out there, but I want to talk about the fundamental mindset change when switching from React class components to function components + hooks. The code-flow visualisations between the class component and function …
React.memo() wisely
To improve user interface performance, React offers a higher-order component React.memo(). By memoizing the rendered output, React skips unnecessary re-rendering. This post helps you distinguish the situations when React.memo() improves the performance, and, not less important, understand when its usage is useless Use React.memo() wisely →
Dev Tools can do a lot of things. We’re are not going to dive into the nitty gritty details of each and every feature. Instead we’ll take a look at the top 10 helpful features that help us save time and write better React code. Good intro (*) on how to find your way around …
Continue reading “How to use React Dev Tools, an introduction”
Good article by Kent C. Dodds, covering the JavaScript paradigms which are used quite a lot when writing React apps. Learning JavaScript features is really advisable for you to be effective building applications with React. So here are a few JavaScript features I’d recommend you spend some time learning so you can be as effective …
react-use – Browser APIs as React Hooks
react-use is a collection of React Hooks that wrap many browser APIs and functions. Want to track the geolocation of a device? Use useGeolocation. Want to read the battery status? Use useBattery. Etc. import {useBattery} from 'react-use'; const Demo = () => { const batteryState = useBattery(); if (!batteryState.isSupported) { return ( <div> <strong>Battery sensor</strong>: …
Kent C. Dodds: As hot as it is, React Hooks require a bit of a change in the way you think about React Component Lifecycles, State, and Side Effects and it can be easy to fall into problematic scenarios if you’re not thinking about React Hooks properly. So let’s look a bit at what pitfalls …
Continue reading “5 Tips to Help You Avoid React Hooks Pitfalls”
Version 4 of the React DevTools have been released, with a lot of improvements. At a high level, this new version should offer significant performance gains and an improved navigation experience. It also offers full support for React Hooks, including inspecting nested objects. The release notes hold a detailed list of changes, with example gifs. …
Yesterday, while at a workshop, React Hooks (intro here) became the subject of discussion between participants. Someone in the audience asked how to easily map the classes+lifecycle way of thinking onto hooks, as she had trouble doing so. In short, my recommendation was to no longer think in lifecycles but to think in effects, as …
Continue reading “React: Forget about component lifecycles and start thinking in effects”
create-es-react-app – A create-react-app like template using only es-modules (no build step).
create-es-react-app is a create-react-app like template demonstrating how far you can get creating progressive web apps (using react) with no build step. It takes advantage of static and dynamic imports which enables you to break up your app into small reusable ES modules that are compiled for you by the browser at run time. TIL: …
useMemo and useCallback Insightful post by Kent C. Dodds on the costs and benefits of React’s useMemo and useCallback. We hear a lot that you should use React.useCallback to improve performance and that “inline functions can be problematic for performance,” so how could it ever be better to not useCallback? Just take a step back from React and …
Continue reading “React: When to use useMemo and useCallback“