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Category: react context

Managing State in React using Unstated-Next

In a previous post, we saw how to manage state using Unstated. As you might recall, Unstated uses React’s built-in setState to allow you create components that can consume state by subscribing to a provider — like the React’s Context API. Well, we’re going to build off that last post by looking at Unstated Next, a library that author Jamie Kyle identifies as the “spiritual successor” to his Unstated project. Unstated Next provides both React Hooks and the Context API for managing state. Unstated was a minimal abstraction to the idea of React Hooks before they were a fully-fledged...

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React 16.6.0 Goodies

React 16.6.0 was released October 2018 and with it came goodies that spice up the way we can develop with React. We’re going to cover what I consider the best of those new goodies with examples of how we can put them to use in our work. React.memo() avoids unnecessary re-rendering There are situations where a component re-renders, even if neither its state nor its props changed. That adds up and can be an expensive operation. Here’s an example of a counter to show what we’re talking about: See the Pen React counter w/o React.memo() by CSS-Tricks (@css-tricks) on...

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Compound Components in React Using the Context API

Compound components in React allow you to create components with some form of connected state that’s managed amongst themselves. A good example is the Form component in Semantic UI React. To see how we can implement compound components in a real-life React application, we’ll build a compound (multi-part) form for login and sign up. The state will be saved in the form component and we’ll put React’s Context AP to use to pass that state and the method from the Context Provider to the component that needs them. The component that needs them? It will become a subscriber to...

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